Lesson 20: Debugging and Running

Running to a Point

Introduction

When executing a program, you can specify a section or line where you want the execution to pause, for any reason you judge necessary. This approach is useful if you have checked code up to a certain point and it looked alright. If you are not sure about code starting at a certain point, this can be your starting point.

To execute code up to a certain point

Right-click the line and click Run to Cursor
Press Ctrl + F10

Practical Learning: Running to a Point

Start Microsoft Visual Studio
On the main menu of Microsoft Visual Studio, click File -> New -> Project...
In the middle list of the New Project dialog box, click Console App (.NET Framework)
Change the project Name to GeorgetownDryCleaningServices7
Click OK
In the Solution Explorer, right-click Program.cs -> Rename
Type CleaningOrder to get CleaningOrder.cs, and press Enter
In the Solution Explorer, right-click ClearningOrder -> Open

Change the document as follows:

using System;

namespace GeorgetownDryCleaningServices7
{
    public class CleaningOrder
    {
        public static int Main(string[] args)
        {
            // Price of items
            const double PriceOneShirt = 1.25;
            const double PriceAPairOfPants = 2.15;
            const double PriceOtherItem = 3.45;
            const double TaxRate = 5.75;  // 5.75%

            // Basic information about an order
            string customerName, homePhone;
            DateTime orderDate = new DateTime();
            DateTime orderTime = new DateTime();
            // Unsigned numbers to represent cleaning items
            ushort numberOfShirts = 0, numberOfPants = 0, numberOfOtherItems = 0;
            // Each of these sub totals will be used for cleaning items
            double subTotalShirts, subTotalPants, subTotalOtherItems;
            // Values used to process an order
            double totalOrder, taxAmount, salesTotal;
            double amountTended = 0, moneyChange;

            Console.Title = "Georgetown Dry Cleaning Services";

            Console.WriteLine("===============================================");
            Console.WriteLine("-/-    Georgetown Dry Cleaning Services     -/-");
            Console.WriteLine("===============================================");
            // Request order information from the user
            Console.Write("Enter Customer Name:                ");
            customerName = Console.ReadLine();
            Console.Write("Enter Customer Phone:               ");
            homePhone = Console.ReadLine();
            Console.Write("Enter the order date (mm/dd/yyyy):  ");
            try
            {
                orderDate = DateTime.Parse(Console.ReadLine());
            }
            catch (FormatException fexc)
            {
                Console.BackgroundColor = ConsoleColor.DarkBlue;
                Console.ForegroundColor = ConsoleColor.Cyan;
                Console.WriteLine(fexc.Message);
            }

            Console.ResetColor();

            Console.Write("Enter the order time (HH:MM):       ");
            try
            {
                orderTime = DateTime.Parse(Console.ReadLine());
            }
            catch (FormatException fexc)
            {
                Console.BackgroundColor = ConsoleColor.DarkBlue;
                Console.ForegroundColor = ConsoleColor.Cyan;
                Console.WriteLine(fexc.Message);
            }

            Console.ResetColor();

            // Request the quantity of each category of items
            try
            {
                Console.Write("Number of Shirts:                   ");
                numberOfShirts = ushort.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("The value you typed for the number of " +
                          "shirts is not a valid number.");
            }

            try
            {
                Console.Write("Number of Pants:                    ");
                numberOfPants = ushort.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("The value you typed for the number of " +
                          "pants is not a valid number.");
            }

            try
            {
                Console.Write("Number of Other Items:              ");
                numberOfOtherItems = ushort.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("The value you typed for the number of " +
                          "other types of items is not a valid number.");
            }

            // Perform the necessary calculations
            subTotalShirts = numberOfShirts * PriceOneShirt;
            subTotalPants = numberOfPants * PriceAPairOfPants;
            subTotalOtherItems = numberOfOtherItems * PriceOtherItem;
            // Calculate the "temporary" total of the order
            totalOrder = subTotalShirts + subTotalPants + subTotalOtherItems;

            // Calculate the tax amount using a constant rate
            taxAmount = totalOrder * TaxRate / 100.00;
            // Add the tax amount to the total order
            salesTotal = totalOrder + taxAmount;

            Console.WriteLine("----------------------------------------------");
            // Communicate the total to the user...
            Console.WriteLine("The Total order is:                 {0:C}", salesTotal);
            // and request money for the order
            try
            {
                Console.Write("Amount Tended?                      ");
                amountTended = double.Parse(Console.ReadLine());
            }
            catch (FormatException)
            {
                Console.WriteLine("You were asked to enter an amount of money but something bad happened.");
            }

            // Calculate the difference owed to the customer
            // or that the customer still owes to the store
            moneyChange = amountTended - salesTotal;

            Console.Clear();
            Console.Title = "Georgetown Dry Cleaning Services";

            // Display the receipt
            Console.WriteLine("=========================================");
            Console.WriteLine("-/- Georgetown Dry Cleaning Services -/-");
            Console.WriteLine("=========================================");
            Console.WriteLine("Customer:   {0}", customerName);
            Console.WriteLine("Home Phone: {0}", homePhone);
            Console.WriteLine("Order Date: {0:D}", orderDate);
            Console.WriteLine("Order Time: {0}", orderTime.ToShortTimeString());
            Console.WriteLine("-----------------------------------------");
            Console.WriteLine("Item Type    Qty Unit/Price Sub-Total");
            Console.WriteLine("-----------------------------------------");
            Console.WriteLine("Shirts{0,9}     {1:C}     {2:C}",
                      numberOfShirts, PriceOneShirt, subTotalShirts);
            Console.WriteLine("Pants{0,10}     {1:C}     {2,6}",
                      numberOfPants, PriceAPairOfPants, subTotalPants.ToString("C"));
            Console.WriteLine("Other Items{0,4}     {1:C}     {2:C}",
                      numberOfOtherItems, PriceOtherItem, subTotalOtherItems);
            Console.WriteLine("-----------------------------------------");
            Console.WriteLine("Total Order:     {0:C}", totalOrder);
            Console.WriteLine("Tax Rate:        {0:P}", TaxRate / 100);
            Console.WriteLine("Tax Amount:      {0:C}", taxAmount);
            Console.WriteLine("Net Price:       {0:C}", salesTotal);
            Console.WriteLine("-----------------------------------------");
            Console.WriteLine("Amount Tended:   {0:C}", amountTended);
            Console.WriteLine("Difference:      {0:C}", moneyChange);
            Console.WriteLine("=========================================");
        
            Console.ReadKey();
            return 0;
        }
    }
}

In the code, right-click the salesTotal = totalOrder + taxAmount; line (Line #109) and click Run To Cursor
Make sure you can see the Code Editor, the Locals window, and the DOS window
If necessary, click the title bar of the DOS window, type the customer name as Steve Longley and press Enter
Enter the following values. Press Enter after entering each value. While you are entering them, check the moving button in the Code Editor and observe the values in the Locals window:

Customer Phone: 301-208-2333

Order Date: 10/08/2019

Order Time: 08:14 AM

Number of Shirts: 5

Number of Pants: 2

Number of Other Items: 8

The focus moves to Microsoft Visual Studio and the Locals window:
Press F5 to continue

For the amount tended, type 60 and press Enter

=========================================
-/- Georgetown Dry Cleaning Services -/-
=========================================
Customer:   Steve Longley
Home Phone: 301-208-2333
Order Date: Tuesday, October 08, 2019
Order Time: 8:14 AM
-----------------------------------------
Item Type    Qty Unit/Price Sub-Total
-----------------------------------------
Shirts        5     $1.25     $6.25
Pants         2     $2.15      $4.30
Other Items   8     $3.45     $27.60
-----------------------------------------
Total Order:     $38.15
Tax Rate:        5.75 %
Tax Amount:      $2.19
Net Price:       $40.34
-----------------------------------------
Amount Tended:   $60.00
Difference:      $19.66
=========================================

Press Enter to close the window and return to the programming environment

Breakpoints

A breakpoint on a line is the code where you want the exection to suspend. You must explicitly specify that line by creating a breakpoint. You can as well create as many breakpoints as you want. Also, at any time, you can remove a breakpoint you don't need anymore.

To create a breakpoint, first identify the line of code where you want to add it. Then:

In the left margin corresponding to the line, click
On the main menu, click Debug -> Toggle Breakpoint
Right-click the line, position the mouse on Breakpoint, and click Insert Breakpoint
Click anything on the line and press F9

A breakpoint is represented by a red circular button. After creating a breakpoint, when code executes and reaches that line, it would pause and let you know by drawing a right-pointing yellow button .

After using a breakpoint, you can remove it. To delete a breakpoint:

Click the breakpoint in the margin
Right-click the line that has the breakpoint, position the mouse on Breakpoint, and click Delete Breakpoint
Click anything on the line that has the breakpoint:
- On the main menu, click Debug -> Toggle Breakpoint
- Press F9

Remember that you can create more than one breakpoint. If you have more than one breakpoint in your code, execution would pause at each one of them. At any time, you can remove one or all breakpoints. To delete all breakpoints, on the main menu, click Debug -> Delete all Breakpoints.

Practical Learning: Using Breakpoints

In the Code Editor, click the margin on the left side of subTotalOtherItems = numberOfOtherItems * PriceOtherItem;
On the main menu, click Debug -> Start Debugging.
Notice that the DOS window displays

When asked, enter the values as follows and press Enter after each

Customer Name:	Hermine Simms
Customer Phone:	410-573-2031
Order Date:	10/08/2019
Order Time:	09:22 AM
Number of Shirts:	3
Number of Pants:	3
Number of Other Items:	12

The focus moves back to Microsoft Visual Studio

Press F5 to continue
For the amount tended, type 100 and press Enter
Press Enter to close the window and return to your programming enviromment
In the code, click the Console.Write("Number of Shirts: "); line
On the main menu, click Debug -> Toggle Breakpoint
In the code, right-click the salesTotal = totalOrder + taxAmount; line, position the mouse on Breakpoint, and click Insert Breakpoint
To start debugging, press F5

When asked, enter the values as follows and press Enter after each

Customer Name:	Ginette Rhoads
Customer Phone:	301-217-9494
Order Date:	11/06/2019
Order Time:	02:07 PM

The focus moves back to Microsoft Visual Studio

Press F5 to continue
When asked, enter the values as follows and press Enter after each

Number of Shirts: 0

Number of Pants: 2

Number of Other Items: 0

The focus moves back to Microsoft Visual Studio
Press F5 to continue
For the amount tended, type 20 and press Enter
Press Enter to close the windows and return to your programming environment

Stepping to Breakpoints

You can combine the Step Into and/or the Step Over features with breakpoints. That is, you can examine each code line after line until you get to a specific line. This allows you to monitor the values of variables and see their respective values up to a critical section. To do this, first create one or more breakpoints, then proceed with steps of your choice.

Practical Learning: Stepping to Breakpoints

Make sure the previous two breakpoints are still selected.
To start debugging, on the main menu, click Debug -> Step Into.
Make sure you can see the Code Editor, the Locals window, and the DOS window
Press F11 continually until the DOS window receives focus
Press F11 continuously (3 times) until your are prompted for the customer name
For the customer name, type James Sandt and press Enter
Press F11 twice to continue
For the customer phone, type 301-870-7454 and press Enter
The focus moves back to Microsoft Visual Studio
Press F11 3 times to continue
For the order date, type 10/10/2019 and press Enter
Press F11 continously. Check the movements in the Code Editor and the rows in the Locals window. Keep pressing F11 until you are asked to type the order time
For the order time, type 18:02 and press Enter
Press F11 continuously. Check the movements in the Code Editor and the rows in the Locals window. Keep pressing F11 until the next prompt in the DOS window
For the number of shirts, enter 8 and press Enter
Press F11 to continuously. Check the movements in the Code Editor and the rows in the Locals window. Keep pressing F11 until the next prompt in the DOS window
For the number of pants, enter 2 and press Enter
Press F11 to continue
For the number of other items, enter 12 and press Enter
Press F11 continuously until the DOS window receives focus
For the amount tended, type 60 and press Enter

Continue pressing F11 to the end

=========================================
-/- Georgetown Dry Cleaning Services -/-
=========================================
Customer:   James Sandt
Home Phone: 301-870-7454
Order Date: Thursday, October 10, 2019
Order Time: 6:02 PM
-----------------------------------------
Item Type    Qty Unit/Price Sub-Total
-----------------------------------------
Shirts        8     $1.25     $10.00
Pants         2     $2.15      $4.30
Other Items  12     $3.45     $41.40
-----------------------------------------
Total Order:     $55.70
Tax Rate:        5.75 %
Tax Amount:      $3.20
Net Price:       $58.90
-----------------------------------------
Amount Tended:   $60.00
Difference:      $1.10
=========================================

Press F11 three times to close the window and retun to your programming environment
Close your programming environment

Debugging and Separate Files

Introduction

As you know already, a program can use many files, some files come from the .NET Framework, some are created by Microsoft Visual Studio when you start a project, and you create the others as you judge them necessary for your project. As a result, when debugging, you can consider files that are linked at one time or another. The process of debugging is primarily the same. You just have to keep in mind that you are dealing with many classes and probably different files. This has some consequences on the results you see.

Practical Learning: Debugging With a Class

Start Microsoft Visual C#
To start a new project, on the main menu, click File -> New -> Project...
In the middle list, click Empty Project (.NET Framework)
Change the Name to Exercise3
Click OK
To create a class, in the Solution Explorer, right-click Exercise3 -> Add -> Class...
In the middle list, make sure Class is selected.
Type Exercise as the name of the class/file
Click Add

Change the class as follows:

using System;

namespace Exercise1
{
    public class Exercise
    {
        public void Display()
        {
            Console.WriteLine("Welcome to the wonderfule world of C#!");
        }
    }
}

Debugging and the Main Function of a Program

As you know already, the starting point of a C# application is the Main() method (in C#, that would be a class that contains a method named Main). If you start debugging an application that uses many code files (files that contain classes), the debugger must first identify the file that contains the Main() method. If you are debugging a regular console application but the debugger cannot find a file that contains the Main() method, you would receive an error, indicating that your project does not contain an entry point.

Practical Learning: Checking the Presence of a Main Method

On the main menu, click Debug -> Start Without Debugging

When you receive an error message box, click No and notice the message in the Error List window

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS5001	Program does not contain a static 'Main' method suitable for an entry point	Exercise1	C:\Users\pkatts\Source\Repos\Consoles\Exercise1\Exercise1\CSC	1	Active

On the main menu, click Debug -> Step Into

Read the error message box and click No. Notice that you receive an error:

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS5001	Program does not contain a static 'Main' method suitable for an entry point	Exercise1	C:\Users\pkatts\Source\Repos\Consoles\Exercise1\Exercise1\CSC	1	Active

Using Separate Files

Instead of just one class or one file, we have learned, and will continue learning, that, to organize your project, you can create the classes of your project in different files. When you debug a project that uses different classes or files that contain classes, the debugger is aware of the objects and where they are created. As we will learn later, there are various windows that assist you with identifying the objects of your project. As a result, the tools such as the Locals window display their contents accordingly.

When debugging a project that uses many code files or contains many classes, when the debugging focuses on a certain variable, if the variable is a structure or a class, an arrow icon appears to its left, indicating that it has members that are fields or properties. Here is an example:

In this case, to show the variables, that is, to expand the node, click the arrow icon. This would show the fields under the variable name and the name of the class between curly brackets under the Value column:

Practical Learning: Introducing Class Debugging

On the main menu, click File -> New -> Project...
In the middle list, click Console App (.Net Framework)
Change the Name to WattsALoan3
Click OK
To create a class, in the Solution Explorer, right-click WattsALoan3 -> Add -> Class...
In the middle list, make sure Class is selected.
Type Customer as the name of the class/file
Click Add

Change the class as follows:

namespace WattsALoan3
{
    public class Customer
    {
        public string FullName    { get; set; }
        public string PhoneNumber { get; set; }

        public Customer(string name = "John Doe", string phone = "000-000-0000")
        {
            FullName    = name;
            PhoneNumber = phone;
        }
    }
}

To create a new class, in the Solution Explorer, right-click WattsALoan3 -> Add -> Class...
Type Employee as the name of the class
Click Add

Change the class as follows:

namespace WattsALoan3
{
    public class Employee
    {
        public long   EmployeeNumber { get; set; }
        public string FirstName      { get; set; }
        public string LastName       { get; set; }
        public string Title          { get; set; }

        public Employee(long emplNbr = 0,
                        string fName = "Unknown",
                        string lName = " Not Specified",
                        string position = "Loan Specialist")
        {
            LastName       = lName;
            FirstName      = fName;
            EmployeeNumber = emplNbr;
            Title          = position;
        }

        public string GetEmployeeName()
        {
            return LastName + ", " + FirstName;
        }
    }
}

On the main menu, click Project -> Add Class...
Type LoanInformation
Click Add

Change the document ase follows:

namespace WattsALoan3
{
    public class LoanInformation
    {
        public double Principal      { get; set; }
        public double InterestRate   { get; set; }
        public double Period         { get; set; }
        public double InterestAmount { get; set; }
        public double FutureValue    { get; set; }
    }
}

In the Solution Explorer, right-click WattsALoan3 -> Add -> Class...
Type LoanEvaluation as the name of the class
Press Enter

Change the class as follows:

using static System.Console;

namespace WattsALoan3
{
    public class LoanEvaluation
    {
        private Employee clerk;
        private Customer client;
        private LoanInformation loan;

        public LoanEvaluation()
        {
            clerk = new Employee();
            client = new Customer();
            loan = new LoanInformation();
        }

        public void IdentifyEmployee()
        {
            WriteLine("Enter the following pieces of information " +
                              "about the employee who prepared this loan.");
            Write("Employee #: ");
            clerk.EmployeeNumber = long.Parse(ReadLine());
            Write("First Name: ");
            clerk.FirstName = ReadLine();
            Write("Last Name:  ");
            clerk.LastName = ReadLine();
            Write("Title:      ");
            clerk.Title = ReadLine();
        }

        public void IdentifyCustomer()
        {
            WriteLine("Enter the following pieces of information " +
                              "about the customer for whom this loan was prepared.");
            Write("Customer Name: ");
            client.FullName = ReadLine();
            Write("Phone Number:  ");
            client.PhoneNumber = ReadLine();
        }

        public void GetLoanValues()
        {
            WriteLine("Enter the following pieces of information " +
                              "about the values used for the loan.");

            Write("Enter the principal: ");
            loan.Principal = double.Parse(ReadLine());

            Write("Enter the interest rate: ");
            loan.InterestRate = double.Parse(ReadLine()) / 100;

            Write("Enter the number of months: ");
            loan.Period = double.Parse(ReadLine()) / 12;
        }

        public void Show()
        {
            loan.InterestAmount = loan.Principal * loan.InterestRate * loan.Period;
            loan.FutureValue = loan.Principal + loan.InterestAmount;

            WriteLine("======================================");
            WriteLine("Loan Summary");
            WriteLine("=------------------------------------=");
            WriteLine("Prepared by:  {0} - {1}\n              {2}",
                              clerk.EmployeeNumber,
                             clerk.GetEmployeeName(), clerk.Title);
            WriteLine("=------------------------------------=");
            WriteLine("Prepared for: {0}\n              {1}",
                              client.FullName, client.PhoneNumber);
            WriteLine("=------------------------------------=");
            WriteLine("Principal:       {0:F}", loan.Principal);
            WriteLine("Interest Rate:   {0:P}", loan.InterestRate);
            WriteLine("Period For:      {0} months", loan.Period * 12);
            WriteLine("Interest Amount: {0:F}", loan.InterestAmount);
            WriteLine("Future Value:    {0:F}", loan.FutureValue);
            WriteLine("======================================");
        }
    }
}

In the Solution Explorer, right-click Program.cs and click Rename
Type WattsALoan to get WattsALoan.cs, and press Enter
Read the text in the message box and click Yes

Click the WattsALoan.cs tab to access it and change its document as follows:

using static System.Console;

namespace WattsALoan3
{
    public class WattsALoan
    {
        public static int Main(string[] args)
        {
            LoanEvaluation evaluation = new LoanEvaluation();

            Title = "Watts A Loan?";

            WriteLine("This application allows you to evaluate a loan");
            evaluation.IdentifyEmployee();
            evaluation.IdentifyCustomer();

            Clear();

            evaluation.GetLoanValues();

            Clear();

            evaluation.Show();
            return 0;
        }
    }
}

To start debugging, press F11.
If you don't see the Locals window, to display it, on the main menu, click Debug -> Window -> Locals
Move the windows to make sure you can see the Code Editor, the Locals window, and the DOS window
Notice that the debugging yellow arrow indicator is positioned on the left of the opening curly bracket of the Main() method.
Notice that at this time, the Locals window contains only the evaluation variable whose value is null.
At this time, the DOS window shows a blinking caret
To continue debugging, on the main menu, click Debug -> Step Into. Check what line is currently active in the WattsALoan.cs document
Again, on the main menu, click Debug -> Step Into.
Notice that the debugger is in the constructor of the LoanEvaluation class in the LoanEvaluation.cs file
In the Locals window, click the right-pointing arrow button of the this object to expand it. Notice that it show the global variables of the class
To continue debugging, on the Standard toolbar, click the Step Into button three times.
Notice that the excution switches to the constructor of the Employee class in the Employee.cs file
In the Locals window, click the right-point arrow button of the this object to expand it
To continue debugging, press F11 three times. Each time, observe the yellow arrow button the Code Editor, the rows in the Locals window, and the Diagnostics Tools window. You may receive a message box:
If you receive a message box, read it and click Yes. Check the current contents of the Locals window:
Keep pressing F11. If the message box comes up, read it and click Yes. Each time, observe the selection in the Code Editor. Observe the rows in the Locals window. Observe the evaluations in the Diagnostics Tools window. Continue until the debugging moves back to the LoanEvaluation class and on the clerk = new Employee(); line
Press F11 and notice that the debugger moves to the client variable
Press F11 and notice that the focus has moved to the Customer constructor of the Customer class in the Customer.cs file
Press F11 six times. Observe the different window, until the debugger moves back to the client variable in the LoanEvaluation constructor
Press F11 three times.
The debugging returns to the evaluation variable in the Main() method of the WattsALoan.cs document
Press F11 two three times.
Notice that the title bar of the DOS window has changed
In the Locals window, click all the right-point arrow button of the evaluation variable to show the current values of the variables for the Employee, the Customer, and the LoanInformation variables
Keep pressing F11 until the title bar of the DOS window indicates that it has focus and you are asked to enter an employee number
When asked for an employee number, type 20584 and press Enter.
If a message box comes up, read it and click Yes
The focus moves back to the Code Editor. In the Locals window, expand the this object and the clerk node.
Notice that the value of the employee number has changed in the Locals window
Press F11 twice.
The focus moves back to the DOS window
For the First Name, type Joshua and press Enter. If a message box comes up, read it and click Yes
The focus moves back to the Code Editor.
Press F11 twice.
The focus moves back to the DOS window
For the Last Name, type Mahmouda and press Enter. If a message box comes up, read it and click Yes
The focus moves back to the Code Editor.
Press F11 twice.
The focus moves back to the DOS window
For the Title, type Accounts Representative and press Enter. If a message box comes up, read it and click Yes
The focus moves back to the Code Editor.
Press F11 and notice that the debugger moves to the evaluation.IdentifyEmployee(); line
Press F11 twice to move the debugger to the IdentifyCustomer() method
Press F11 three times (observe the selections in the Code Editor and the evaluation in the Diagnostics Tools window) until the focus moves to the DOS window
When asked to provide a customer name, type Lauren Sachs and press Enter. If a message box comes up, read it and click Yes
The focus moves back to the Code Editor.
In the Locals window, expand this and expand the client node
Press F11 twice.
The focus moves back to the DOS window
For the Phone Number, type (301) 438-6243 and press Enter. If a message box comes up, read it and click Yes
The focus moves back to the Code Editor.
Press F11 to move to the evaluation.IdentifyCustomer(); line
Press F11 a few times (7) until the DOS window receives focus
For the value of the principal, type 24750 and press Enter. If a message box comes up, read it and click Yes
The focus moves to the Code Editor.
In the Locals window, expand this and expand loan. Notice that the value of the principal has changed
Press F11 to move the debugger to the loan.InterestRate = double.Parse(ReadLine()) / 100; line
Press F11 again to move focus to the DOS window
In the DOS window, when you are asked to provide the interest rate, type 11.35 and press Enter. If a message box comes up, read it and click Yes
Press F11 to move focus to the loan.Period = double.Parse(ReadLine()) / 12; line
Press F11 again to move the debugging to the DOS window
In the DOS window, for the number of months, type 60 and press Enter. If a message box comes up, read it and click Yes
Keep pressing F11. Every time a message box comes up, read it and click Yes.
Observe the selected lines in the Code Editor and the values in the Locals window. Observe the new lines in the DOS window

Continue pressing F11 until the summary has displayed:

======================================
Loan Summary
=------------------------------------=
Prepared by:  20584 - Mahmouda, Joshua
              Accounts Representative
=------------------------------------=
Prepared for: Lauren Sachs
              (301) 438-6243
=------------------------------------=
Principal:       24750.00
Interest Rate:   11.35 %
Period For:      60 months
Interest Amount: 14045.63
Future Value:    38795.63
======================================

Keep pressing F11 until the DOS window closes
Cloee your programming environment


Previous	Copyright © 2010-2019, FunctionX	Next

Customer Phone:	301-208-2333
Order Date:	10/08/2019
Order Time:	08:14 AM
Number of Shirts:	5
Number of Pants:	2
Number of Other Items:	8