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pjlowry/factorial_method2.rb

Created January 24, 2013 23:58
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! boom !
Raw
factorial_method2.rb
def factorial(n)
if n <= 1
"1"
else (1..n).inject {|product, nb| product * nb }
end
end
puts "'#{factorial(5)}' should equal '120'."
puts "'#{factorial(0)}' should equal '1'."
puts "'#{factorial(-5)}' should equal '1'."
puts "'#{factorial(25)}' should equal '15511210043330985984000000'."
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