Return the lowest index at which a value should be inserted into an array

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

For example, getIndexToIns([1,2,3,4], 1.5) should return 1 because it is greater than 1 (index 0), but less than 2 (index 1).

Likewise, getIndexToIns([20,3,5], 19) should return 2 because once the array has been sorted it will look like [3,5,20] and 19 is less than 20 (index 2) and greater than 5 (index 1).

function getIndexToIns(arr, num) {

  

  arr.sort((a,b)=>{return a-b});

  if (num>=arr[arr.length-1]){

    return arr.length;

  }

  else if(num<=arr[0]||arr.length==0)

  {

    return 0;

  }

  else

  {

    for(let i=0;i<arr.length;i++)

  {

    if(num>arr[i]&&num<=arr[i+1])

    {

      return i+1;

    }

  }

  } 

 

}

console.log(getIndexToIns([40, 60], 50));

getIndexToIns([40, 60], 50);