JavaScript Loop Control

In JavaScript, loop control statements allow you to modify the execution of loops. There are three types of loop control statements in JavaScript:

1. break: The break statement terminates the current loop or switch statement and transfers control to the statement immediately following the terminated statement.

Example:

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

2. continue: The continue statement skips the current iteration of the loop and continues with the next iteration.

Example:

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

3. return: The return statement can be used inside a loop to immediately stop the execution of the function and return a value.

Example:

function findIndex(arr, value) {
  for (let i = 0; i < arr.length; i++) {
    if (arr[i] === value) {
      return i;
    }
  }
  return -1;
}

In the above example, the return statement is used inside a for loop to immediately return the index of the element if it is found in the array. If the element is not found, the function returns -1.