JavaScript for Loop Guide

for Loop – Classic counter‑based loop. Executes the block repeatedly while the condition is true. Gives full index control.

👉 Syntax

for (let i = 0; i < array.length; i++) {
  // use array[i]
}

🧪 Example

const nums = [10, 20, 30];
for (let i = 0; i < nums.length; i++) {
  console.log(i, nums[i]);
}