The Missing Last Element

Your first ticket: the cart total is always a bit too low.

sumArray(nums) should return the sum of every number in the array.

Fix the code so every test passes. Keep the function name sumArray.

Test cases

• sumArray([1,2,3]) → 6
• sumArray([10]) → 10
• sumArray([]) → 0
• sumArray([-2,5,4]) → 7

Stuck? Hints go from a nudge to the exact fix.