🔁 Looping Through Arrays

Last Updated: 15th October 2025

When we store many values in an array, we often need to visit each element — for that we use loops.

Hinglish Tip 🗣: Array me jab kai items ho, loop har item par ek-ek karke kaam karta hai — print, check, modify, etc.

1. while loop

Use when the number of iterations depends on a condition.

const fruits = ["Apple", "Banana", "Cherry"];
let i = 0;

while (i < fruits.length) {
  console.log(fruits[i]);
  i++;
}

Hinglish Tip 🗣: while tab use karo jab aap condition pe depend kar rahe ho.

2. do-while loop

Runs the body once, then checks the condition.

const fruits = ["Apple", "Banana", "Cherry"];
let i = 0;

do {
  console.log(fruits[i]);
  i++;
} while (i < fruits.length);

3. for loop (classic)

  • Most common and explicit way to iterate arrays.
  • You control start, end, and step.
  • Useful when you need the index for each element.
const fruits = ["Apple", "Banana", "Cherry"];

for (let i = 0; i < fruits.length; i++) {
  console.log(fruits[i]);
}

for...of loop (modern & simple)

Iterates values directly — clearer and less error-prone than index loops.Recommended for simple iterations.

const fruits = ["Apple", "Banana", "Cherry"];

for (const fruit of fruits) {
  console.log(fruit);
}

for ...in loop (less common)

Iterates Index directly.

const fruits = ["Apple", "Banana", "Cherry"];

for (const index in fruits) {
  console.log(fruits[index]); // Apple, Banana, Cherry
}

💡 Quick Practice

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