Use cases for continue and break statements in JavaScript.

In JavaScript, the continue and break statements are used to control the flow of execution within loops.

The continue statement used to skip the current iteration of a loop and move on to the next iteration. It is often used when you only want to process certain elements within a loop.

The break statement is used to exit a loop altogether and move on to the next statement after the loop. It is often used when you want to find the first occurrence of a certain value within an array,

Here are more examples of where continue and break can be used in JavaScript, along with specific examples:

• continue:

  • Filtering an array:

    cssCopy codeconst numbers = [1, 2, 3, 4, 5, 6];
    for (let i = 0; i < numbers.length; i++) {
      if (numbers[i] % 2 !== 0) {
        continue;
      }
      console.log(numbers[i]);
    }
    // Output: 2 4 6

In this example, the continue statement skips over any elements in the numbers array that are not even.

• Processing only a specific set of elements:

    cssCopy codeconst elements = ['apple', 'banana', 'cherry', 'date', 'elderberry'];
    for (let i = 0; i < elements.length; i++) {
      if (i !== 2 && i !== 4) {
        continue;
      }
      console.log(elements[i]);
    }
    // Output: cherry elderberry

In this example, the continue statement skips over all elements in the elements array except for the third and fifth elements, which are logged to the console.

• break:

  • Finding the first occurrence of an element in an array:

    javascriptCopy codeconst numbers = [1, 2, 3, 4, 5, 6];
    for (let i = 0; i < numbers.length; i++) {
      if (numbers[i] === 4) {
        console.log(`Found ${numbers[i]} at index ${i}.`);
        break;
      }
    }
    // Output: Found 4 at index 3.

In this example, the break the statement is used to exit the loop as soon as the number 4 is found in the numbers array.

• Validating user input:

    luaCopy codewhile (true) {
      const input = prompt('Enter a number between 1 and 10:');
      if (input >= 1 && input <= 10) {
        console.log(`Valid input: ${input}`);
        break;
      }
      console.log('Invalid input. Try again.');
    }

In this example, the break the statement is used to exit the loop when the user enters a valid number between 1 and 10. If the user enters an invalid number, the loop continues until a valid input is received.

If you have any issues or questions about it, feel free to contact me. Thank you 🌟 for reading! like, share and subscribe to my newsletter for more!

🔗Debasish Lenka