Loops are used to execute a block of code repeatedly.

1. for loop: Often used when you know how many times you want the loop to run. Syntax: for (initialization; condition; finalExpression) { // code block }

• initialization: Executed once before the loop starts (e.g., let i = 0).
• condition: Evaluated before each iteration. If true, the loop continues.
• finalExpression: Executed at the end of each iteration (e.g., i++).

for (let i = 0; i < 5; i++) {
  console.log("Iteration number " + i);
}
// Output:
// Iteration number 0
// Iteration number 1
// ...
// Iteration number 4

2. while loop: Repeats a block of code as long as a specified condition is true.

let count = 0;
while (count < 3) {
  console.log("Count is " + count);
  count++;
}
// Output:
// Count is 0
// Count is 1
// Count is 2

Ensure the condition eventually becomes false to avoid an infinite loop.

3. do...while loop: Similar to while, but the code block is executed at least once before the condition is checked.

let num = 5;
do {
  console.log("Number is " + num);
  num++;
} while (num < 5); // Condition is false, but block ran once.
// Output: Number is 5