Curriculum Series

What is the purpose of break and continue?

What is the purpose of break and continue?

What is the purpose of break and continue?

JavaScript

The short answer

break exits a loop entirely — no more iterations run. continue skips the current iteration and jumps to the next one. Both give you control over loop execution flow.

break

javascript
for (let i = 0; i < 10; i++) {
  if (i === 5) break; // exits the loop
  console.log(i);
}
// Output: 0, 1, 2, 3, 4

Common use: stop searching once you find what you need:

javascript
const users = [
  { name: 'Alice' },
  { name: 'Bob' },
  { name: 'Charlie' },
];
let found;


for (const user of users) {
  if (user.name === 'Bob') {
    found = user;
    break; // no need to check the rest
  }
}

continue

javascript
for (let i = 0; i < 10; i++) {
  if (i % 2 === 0) continue; // skip even numbers
  console.log(i);
}
// Output: 1, 3, 5, 7, 9

Common use: skip items that do not meet a condition without nesting inside if:

javascript
for (const item of items) {
  if (!item.active) continue;
  processItem(item);
}

In switch statements

break is also used in switch to prevent fall-through:

javascript
switch (color) {
  case 'red':
    console.log('Stop');
    break; // without this, it falls through to the next case
  case 'green':
    console.log('Go');
    break;
}

Interview Tip

Show one example of each with a for loop. Mention that break is also used in switch statements. This is a basic question — keep it short.

Why interviewers ask this

This tests fundamental control flow knowledge. It is a simple question usually asked in early-career interviews.

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