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pjlowry/factorial.rb

Last active December 11, 2015 16:18
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big numbers!!!
Raw
factorial.rb
def factorial(number)
if number < 0
"You can't take the factorial of a negative number"
elsif number == 0
1
else
(2..number).inject (:*)
end
end
puts "'#{factorial(0)}' should equal '1'."
puts "'#{factorial(5)}' should equal '120'."
puts "'#{factorial(-2)}' should equal 'You can't take the factorial of a negative number'."
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