The switch statement takes a variable. The variable is compared to all cases.

If there is a match, the associated block of code is executed. If there is no match, the default code block is executed.

When JavaScript reaches a break keyword, it breaks out of the switch block.

It is not necessary to break the last case in a switch block. The block breaks (ends) there anyway.

Switch cases use strict comparison (===)

const number = 2;

switch(number) {
  case 0:
    console.log("The number was zero.");
    break;
  case 1:
  case 2:
  case 3:
    console.log("The number was one, two or three.");
    break;
  default:
    console.log("The number was an other number.");
}

In this example, the number is 2. As you can see the output will be: The number was one, two or three.