Control Statements in VB.NET - Control Statements Overview

Control statements in VB.NET are used to control the flow of execution of a program. They are used to make decisions, loop through code blocks, and to execute code based on certain conditions. In this page, we will provide an overview of various control statements in VB.NET.

Syntax

There are several types of control statements in VB.NET including If-Then-Else, Select Case, For, While, Do-While, and Do-Until statements. Here is the general syntax for each type of control statement:

If-Then-Else

If condition Then
    ' Code to execute if condition is true
Else
    ' Code to execute if condition is false
End If

Select Case

Select Case expression
    Case value1
        ' Code to execute if expression matches value1
    Case value2
        ' Code to execute if expression matches value2
    Case Else
        ' Code to execute if expression matches none of the cases
End Select

For

For counter = start To end
    ' Code to execute in each iteration of the loop
Next

While

While condition
    ' Code to execute while condition is true
End While

Do-While

Do While condition
    ' Code to execute while condition is true
Loop

Do-Until

Do Until condition
    ' Code to execute until condition is true
Loop

Example

Here's an example of how control statements can be used in VB.NET to determine whether a number is positive, negative, or zero.

Dim number As Integer = 5

If number > 0 Then
    Console.WriteLine("The number is positive.")
ElseIf number < 0 Then
    Console.WriteLine("The number is negative.")
Else
    Console.WriteLine("The number is zero.")
End If

Output:

The number is positive.

Explanation

Control statements allow a program to flow based on certain conditions. In the example above, the If-Then-Else statement checks if the number is greater than 0, less than 0, or equal to 0 and executes the appropriate code block based on the condition.

Use

Control statements are used to define the flow of code in your program. You can use them to make decisions, perform actions repeatedly, or to handle exceptions when they occur.

Important Points

• Control statements in VB.NET are used to control the flow of execution of a program.
• Common control statements in VB.NET include If-Then-Else, Select Case, For, While, Do-While, and Do-Until statements.
• Control statements are used to make decisions, loop through code blocks, and to execute code based on certain conditions.

Summary

In this page, we provided an overview of control statements in VB.NET. We covered the syntax, example, output, explanation, use, and important points of control statements. By using control statements, you can control the flow of execution of your program and handle various conditions and exceptions.