JavaScript Break and Continue

这 break statement "jumps out" of a loop.

这 continue statement "jumps over" one iteration in the loop.

The Break Statement

You have already seen the break statement used in an earlier chapter of this tutorial. It was used to "jump out" of a switch() statement.

这 break statement can also be used to jump out of a loop:

In the example above, the break statement ends the loop ("breaks" the loop) when the loop counter (i) is 3.

The Continue Statement

这 continue statement breaks one iteration (in the loop), if a specified condition occurs, and continues with the next iteration in the loop.

This example skips the value of 3:

JavaScript Labels

To label JavaScript statements you precede the statements with a label name and a colon:

这 break and the continue statements are the only JavaScript statements that can "jump out of" a code block.

Syntax:

这 continue statement (with or without a label reference) can only be used to skip one loop iteration.

这 break statement, without a label reference, can only be used to jump out of a loop or a switch.

With a label reference, the break statement can be used to jump out of any code block:

for (i = 0; i < 10; i++) {
  console.log(i);
  if (i == 5) {   
    ;
  }
}