Where do I Belong not working

Code is failing
This works perfectly when logging each example but failing when compiling

function getIndexToIns(arr, num) {
for(var val in arr){
      return ""+val;
getIndexToIns([40, 60], 50);
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Challenge: Where do I Belong

Link to the challenge:

Minor quibble - JavaScript is not compiled. You don’t have a compilation failure :slight_smile:

Small question as I look at you code:

Why are you converting the return value into a string?

Ok, take a look at this:

function getIndexToIns(arr, num) {
  // Note: using let is recommended
  // instead of var
  for (var val in arr) {
    // The instructions say that this
    // function must return a number.
    // Are you returning a number?
    if (arr[val] >= num) {
      return val;
  // What are you returning if no value
  // is bigger than num?
console.log(getIndexToIns([10, 20, 30, 40, 50], 35));

Once you look at those few issues, you’ll be pretty close to passing all tests. The only thing you’ll have left is

Return the lowest index at which a value (second argument) should be inserted into an array (first argument) once it has been sorted.