JavaScript Break and Continue
The break statement "jumps out" of a loop.
The 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.
The break statement can also be used to jump out of a loop:
Example
for (let i = 0; i < 10; i++) {
if (i === 3) { break; }
text += "The number is " + i + "<br>";
}
Try it Yourself »
In the example above, the break statement ends the loop ("breaks" the loop)
when the loop counter (i) is 3.
The Continue Statement
The 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:
Example
for (let i = 0; i < 10; i++) {
if (i === 3) { continue; }
text += "The number is " + i + "<br>";
}
Try it Yourself »
JavaScript Labels
To label JavaScript statements you precede the statements with a label name
and a colon:
label:statements
The break and the continue statements are the only JavaScript statements that
can "jump out of" a code block.
Syntax:
break labelname; continue labelname;
The continue
statement (with or without a label reference) can only be used to skip one
loop iteration.
The 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:
Example
const cars = ["BMW", "Volvo", "Saab", "Ford"];list: { text += cars[0] + "<br>";
text += cars[1] + "<br>"; break list; text += cars[2] + "<br>";
text += cars[3] + "<br>"; }
Try it Yourself »
A code block is a block of code between { and }.
Test Yourself With Exercises
Exercise:
Make the loop stop when i is 5.
for (i = 0; i < 10; i++) {
console.log(i);
if (i == 5) {
;
}
}
Submit Answer »
Start the Exercise
★
+1
Reference: https://www.w3schools.com/js/js_break.asp