? JavaScript while Loop

The while loop repeats a block of code as long as a specified condition is true.

? Syntax

while (condition) {  // code to be executed repeatedly}

• Before each iteration, the condition is evaluated.

• If the condition is true, the loop runs.

• If the condition is false, the loop stops.

? Example: Basic while Loop

let i = 0;while (i < 5) {  console.log("Count: " + i);  i++;  // increment to avoid infinite loop}

Output:

Count: 0Count: 1Count: 2Count: 3Count: 4

? Important: Avoid Infinite Loops

If the condition never becomes false, the loop will run forever!

while (true) {  // This will run infinitely unless broken out}

Use break or update conditions properly.

? Example: Using break to Exit Loop

let i = 0;while (true) {  console.log(i);  i++;  if (i === 3) {    break;  // exit loop when i is 3  }}

Output:

012

Would you like examples for do...while or for loops next?