Michael Kaiser-Nyman michaelrkn
michaelrkn
/ factorial.rb
Last active
December 11, 2015 16:48
— forked from pjlowry/factorial.rb
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| def factorial(n) | |
| if n < 0 | |
| raise "You can't take the factorial of a negative number." | |
| elsif n == 0 | |
| 1 | |
| else | |
| (1..n).inject(:*) | |
| end | |
| end |