Switch-case typescript case not working on string [duplicate]

Question

I have the following switch simple case:

let ca: string = "2";

switch (ca) {
case "2":
    console.log("2");

 case "1":
    console.log("1");

default:
    console.log("default");

}

I'm trying to understand why the output of this code is:

2
1
default

My expected output is

2 default

why its print

1

even if ca isn't equal "1"?

EDIT: I know that I can add break statment - I just trying to understand why case "1" occurred if ca="2"

Thanks.

Answer 1

You need to add a break statement in each of the case you have for the switch block otherwise it will keep executing further once the match is found.

let ca: string = "2";

switch (ca) {
  case "2":
    console.log("2");
    break;

  case "1":
    console.log("1");
    break;

  default:
    console.log("default");
}