While loop

A while loop will repeat (iterate) a code block while a condition is true.

This type of loop is known as indefinite iteration.

Example

The following C Sharp code will loop until the user enters 'stop':

String input;
while (input != "stop")
{
    input = Console.ReadLine();
}

Do while loop

If you want the code to run at least once before checking the condition, you can use a do while loop.

See: Do while loop