Checking for Number / NaN type with switch-case

Question

function timeAdder(value) {
  switch (value) {
    case Number:
      console.log("its a number");
      break;

    case isNaN:
      console.log("its not a number");
      break;

    default:
      console.log("erroe");
      break;

  }
}

timeAdder("a")

Was there any particular reason you wanted to use `switch` for this? It looks like you only really want to check whether a value was a number or not. — Andy, Aug 07 '21 at 09:55

score 0 · Answer 1 · answered Aug 07 '21 at 08:34

Change your code like below.Use typeof operator to check the type of the variable

function timeAdder(value) {
  switch (typeof value) {
    case "number":
      console.log("its a number");
      break;

    case "string":
      console.log("its not a number");
      break;

    default:
      console.log("erroe");
      break;

  }
}

timeAdder("a")
timeAdder(3)

score 0 · Answer 2 · answered Aug 07 '21 at 08:35

You may need to use type of

function timeAdder(value) {
  switch (typeof value) {
    case 'number':
      console.log("its a number");
      break;

    case 'string':
      console.log("its not a number, it is string");
      break;

    default:
      console.log("erroe");
      break;

  }
}

timeAdder("A")
timeAdder(1)

Checking for Number / NaN type with switch-case

2 Answers2