Breaking Out of Nested Loops

Imagine a situation: you have a grid of numbers (a loop inside a loop), and upon finding the necessary element, you want to stop EVERYTHING. A regular break will only exit the inner loop, and the outer one will keep going.

Labels

A label is a name with a colon placed BEFORE a loop.

outerLoop: for (let i = 0; i < 5; i++) {
  for (let j = 0; j < 5; j++) {
    if (found) break outerLoop; // Exit BOTH loops IMMEDIATELY
  }
}

Important Rules

• A label does not allow you to jump to an arbitrary place in the code. It only works INSIDE the loop it's attached to.
• You can also use labels with continue.