Why loop control is required in Javascript

Introduction

Loop control helps us manage how many times a loop runs. It stops loops from running forever and lets us skip or end loops early.

When you want to repeat a task a certain number of times.

When you need to stop a loop if a condition is met.

When you want to skip some steps inside a loop.

When you want to avoid infinite loops that freeze your program.

Syntax

Javascript

for (let i = 0; i < 10; i++) {
  // loop body
  if (condition) {
    break; // stops the loop
  }
  if (otherCondition) {
    continue; // skips to next loop cycle
  }
}

break stops the whole loop immediately.

continue skips the rest of the current loop cycle and moves to the next one.

Examples

This loop stops completely when i equals 3.

Javascript

for (let i = 0; i < 5; i++) {
  if (i === 3) {
    break;
  }
  console.log(i);
}

This loop skips printing when i equals 2 but continues with other numbers.

Javascript

for (let i = 0; i < 5; i++) {
  if (i === 2) {
    continue;
  }
  console.log(i);
}

Sample Program

This program prints odd numbers from 1 to 5. It skips even numbers and stops the loop when i reaches 6.

Javascript

for (let i = 1; i <= 10; i++) {
  if (i === 6) {
    break;
  }
  if (i % 2 === 0) {
    continue;
  }
  console.log(i);
}

Important Notes

Without loop control, loops might run forever and crash your program.

Use break to stop loops early when you find what you need.

Use continue to skip steps you don't want to run inside the loop.

Summary

Loop control helps manage how loops run and stop.

break stops the loop completely.

continue skips to the next loop cycle.