var numArray = []; function range(start, stop) { for (start; start <= stop; start++) { numArray.push(start) } return numArray; } function sum(numArray) { let sumArray = 0; for (i = 0; i < numArray.length; i++){ sumArray = sumArray + numArray[i] } return sumArray; } console.log(sum(range(1, 10)));