Euler Project Problem #020

euler20.rb

# Solution to Project Euler's twentieth problem
# http://projecteuler.net/index.php?section=problems&id=20
# Find the sum of all the digits in 100 factorial.

def factorial(number)
	product = 1
	(1..number).each {|n| product = product * n} 
	return product
end
def generate_array(number)
	number = number.to_s
	array = []
	(0..number.length-1).each {|n| array.push number.slice(n).to_i}
	return array
end
def sum_array(array)
	sum = 0
	array.each {|n| sum = sum + n}
	return sum
end

number = 100
number = factorial(number)
p number
digits = generate_array(number)
p digits
sum = sum_array(digits)
p sum