Generally, Visual Basic, if statement or if-else statement is useful when we have one condition to validate and execute the required block of statements. If we have multiple conditions to validate and execute only one block of code, then the If-Else-If statement is useful in our application.

The syntax of an if...else if...else statement in VB.Net is as follows − ' Executes when the boolean expression 1 is true ' Executes when the boolean expression 2 is true ' Executes when the boolean expression 3 is true ' executes when the none of the above condition is true

To provide clarity on how to implement If Then Else statements in Visual Basic, let’s explore some practical examples. Example 1: Simple If Then Else Statement This example checks whether a user input number is positive or negative. MsgBox("The number is positive.") MsgBox("The number is negative.") Example 2: If Then ElseIf Statement

Console.WriteLine("Grade: D or F") In this scenario, the program checks the value of score against several thresholds and outputs the corresponding grade. Visual Basic also supports nested If Then Else statements, allowing you to place an If statement within another If statement. This feature is useful for evaluating more complex conditions.