Sum all digits in numbers from 0 to Y
Both scripts do the same - just sum every digit in every number. ex. 0 - 12 = 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 1 + 0 + 1 + 1 + 1 + 2 = 51
Both versions use fork and tested on linux.