While in Visual Basic .NET

In Visual Basic .NET, the while loop is used to execute a block of code repeatedly as long as a specified condition is true.

The syntax for while loop is as follows:

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

Here's an example that demonstrates a while loop:

Dim i As Integer = 1
While i <= 5
    Console.WriteLine("Current value of i is " & i)
    i = i + 1  ' increment i
End While

Output:

Current value of i is 1
Current value of i is 2
Current value of i is 3
Current value of i is 4
Current value of i is 5

In the above example, the loop is executed as long as the condition i <= 5 is true. During each iteration of the loop, the value of i is printed and then incremented by 1. Once the value of i becomes greater than 5, the loop is exited.

Here's another example that demonstrates the use of while loop with user input:

Dim userInput As String = String.Empty
While userInput <> "exit"
    Console.WriteLine("Enter a word. Type 'exit' to stop.")
    userInput = Console.ReadLine()
    Console.WriteLine("You entered: " & userInput)
End While

Output:

Enter a word. Type 'exit' to stop.
Apple
You entered: Apple
Enter a word. Type 'exit' to stop.
Banana
You entered: Banana
Enter a word. Type 'exit' to stop.
Pear
You entered: Pear
Enter a word. Type 'exit' to stop.
exit
You entered: exit

In the above example, the while loop is executed as long as the user does not enter "exit". During each iteration of the loop, the user is prompted to enter a word. The word is then printed on the console. Once the user enters "exit", the loop is exited.