while Loop

In this page:

while Loop

while Loop

A while loop checks its condition before every iteration and keeps running as long as it evaluates to true. It's ideal when the number of iterations isn't known ahead of time. If the condition starts false, the body never executes.

Warning: Forgetting to update the loop variable inside the body creates an infinite loop.

Example: while Loop

markup

using System;

class Program
{
    static void Main(string[] args)
    {
        int n = 20;
        int steps = 0;

        while (n > 1)
        {
            n = n % 2 == 0 ? n / 2 : n * 3 + 1;
            steps++;
        }

        Console.WriteLine($"Reached 1 in {steps} steps");
    }
}

🔒

Chapter Quiz — Complete all 7 topics to unlock

0/7 topics done

Complete these topics first:

if / else
switch Statement
for Loop
while Loop
do-while Loop
foreach Loop
break and continue

← Previous Lesson for Loop Next Lesson → do-while Loop

while Loop

while Loop

Chapter Quiz — Complete all 7 topics to unlock

Login to run this code