020 Factorial digit sum.sf

#!/usr/bin/ruby

# Author: Daniel "Trizen" Șuteu
# License: GPLv3
# Website: https://github.com/trizen

# Find the sum of the digits in the number 100!

# https://projecteuler.net/problem=20

# Runtime: 0.110s

var n = 100!
say +(^n.len).map { |i| n.digit(i) }.sum

# Alternatively:
say 100!.digits.sum

# Alternatively 2:
say 100!.sumdigits