JavaScript Beginner Day 5: Loops

Goal of this Day

Today you will learn:

• How to repeat actions using loops
• The for loop
• The while loop

By the end, you will be able to automate repetitive tasks in JavaScript.

Step 1: Why Loops?

Loops are used to repeat code multiple times.

Example:

• Print numbers
• Repeat tasks

Step 2: for Loop

The for loop runs a specific number of times.

for (let i = 1; i <= 5; i++) {
  console.log(i);
}

Explanation:

• i = 1 → start
• i <= 5 → condition
• i++ → increase

Step 3: while Loop

The while loop runs as long as a condition is true.

let i = 1;

while (i <= 5) {
  console.log(i);
  i++;
}

Practice

for (let i = 1; i <= 5; i++) {
  console.log(i);
}

Task

Complete the following tasks:

• Print numbers from 1 to 10
• Print only even numbers

Example:

// 1 to 10
for (let i = 1; i <= 10; i++) {
  console.log(i);
}

// Even numbers
for (let i = 1; i <= 10; i++) {
  if (i % 2 === 0) {
    console.log(i);
  }
}