gistfile1.rb

# Create Fibonnaci Array
a = [1,2]
upto = 4_000_000
while a[-2] + a[-1] < upto
  a << a[-2] + a[-1] 
end
 
# Create sum of even Fibonnaci numbers
sum = 0
a.each { |x| sum+= x if x.even? }
 
puts "The result is #{sum}"
 
##
 
summa, a, b = 0, 1, 2
 
while b < 4000000
  summa += b if b.even?
  a, b = b, a + b
end
 
puts summa