Replacing If Else Chains with Switch

so why is this answer not working?

function chainToSwitch(val) {
var answer = “”;
// Only change code below this line

switch (val) {
case "bob":
answer = "Marley";
break;
case 42:
answer = "The Answer";
    break;
case 1:
answer = "There is no #1";
    break;
case 99:
answer = "Missed me by this much!";
break;
case 7:
answer = "Ate Nine";
    break;
  default:

}

// Only change code above this line
return answer;
}

// Change this value to test
chainToSwitch(bob);

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