如何在函数中使用switch

Question

I'm trying to get an output from a function converted by switch statement:

 function switchItUp(number) { switch (number) { case 1: let output = 'one'; break; default: } return output } console.log(switchItUp(1));

Answer 1

Define output in the outer scope (function's)

 function switchItUp(number) { let output; switch (number) { case 1: output = 'one'; break; default: } return output } console.log(switchItUp(1));

Answer 2

You need to define output variable out of switch and in switch assign value to it

function switchItUp(number) {
  let output;
  switch (number) {
    case 1:
      output = 'one';
      break;
    default:
  }
  return output
}
console.log(switchItUp(1))

or more simple you can return where switch breaks:

 function switchItUp(number) { switch (number) { case 1: return 'one'; default: } } console.log(switchItUp(1))

Answer 3

 function switchItUp(number) { switch (number) { case 1: let output = 'one'; return output; default: } } console.log(switchItUp(1));

Answer 4

You will have to define the output to before the switch statement like below:

function switchItUp(number) {   
  let output;
  switch (number) {
     case 1:
       output = 'one';
       break;
     default:
  }
  return output
}

Hope this will works for you