C sharp - while loop

A while loop in C# is used to repeatedly execute a block of code as long as a specified condition is true. It checks the condition before each iteration, making it a pre-test loop.

Syntax:

while(condition)
{
    // Code to execute while the condition is true
}

  • condition: A Boolean expression. If it evaluates to true, the loop continues.

  • The loop stops when the condition becomes false.

Example:

int i = 0;

while (i < 5)

{

    Console.WriteLine("i = " + i);

    i++; 
}

  • If the condition is false initially, the loop body won’t execute at all.

  • You must ensure the loop will eventually terminate by updating variables inside the loop. Otherwise, you'll create an infinite loop.

 Infinite Loop Example:

while (true)
{
    Console.WriteLine("This will run forever unless broken manually.");
}

You can use break or other conditions inside the loop to exit it when needed.