ProjectRuler-1

#If we list all the natural numbers below 10 
#that are multiples of 3 or 5, we get 3, 5, 6 and 9.
#The sum of these multiples is 23.
#Find the sum of all the multiples of 3 or 5 below 1000. 

def sumOne
  sum = 0
  (1...1000).to_a.each { |i| (i%3==0 || i%5==0) ? sum += i.to_i : nil }
  puts sum
end

sumOne