Consider the following pseudo-code:   ```     function calculate(arr):         sum = 0         for i from 0 to length(arr) - 1:             if arr[i] % 2 == 0:                 sum = sum + arr[i]             else:                 sum = sum - arr[i]         return sum     my_array = [1, 2, 3, 4, 5]     result = calculate(my_array)     print(result)     ```     What will be the output of this code?