Which keyword is used to stop the loop prematurely?

The keyword used to stop a loop prematurely in JavaScript is "break." When "break" is encountered within a loop, it immediately exits the loop, even if the loop condition is still true or there are more iterations remaining. This is useful for early termination of a loop based on a specific condition. "continue" skips the current iteration and moves to the next one, while "exit" and "return" have different purposes and are not used for loop control.