Switch Case

The switch statement provides a convenient way to execute different blocks of code depending on the value of a variable or expression.

Syntax:

switch (expression) {
  case value1:
    // Code to be executed if expression matches value1
    break;
  case value2:
    // Code to be executed if expression matches value2
    break;
  case value3:
    // Code to be executed if expression matches value3
    break;
  default:
    // Code to be executed if expression doesn't match any of the values
    break;
}

Code:

<!DOCTYPE html>
<html>
  <head>
    <title>Hello JS 💛</title>
    <script>
     const num = 3

    switch (num) {
  case 1:
    document.write("one");
    break;

  case 2:
    document.write("two");
    break;

  case 3:
    document.write("three");
    break;

    case 4:
    document.write("four");
    break;

    case 5:
    document.write("five");
    break;

  default:
    document.write("wrong input");
    break;
}
    </script>
  </head>
  <body></body>
</html>

In the above code we uses a switch statement to evaluate the value of the variable num. The switch statement checks if num is equal to different cases and executes the code block associated with the first matching case.

In this case, since num is assigned the value of 3, the code block associated with the case 3 label is executed, which will write the string three to the document.

If num had a different value, the default case would be executed, which would write the string wrong input to the document.

Overall, this code is a simple example of using a switch statement in JavaScript to evaluate the value of a variable and execute different code blocks based on the value.

Switch Case​

Switch Case