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imetallica/factorial.erl

Last active August 29, 2015 14:27
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factorial.erl
-module(factorial).
-export[fac1/1, fac2/1].
%% With guards
fac1(x) when x <= 0 -> 1;
fac1(x) when x > 0 -> x * fac(x-1).
%% With pattern-matching [does not handle x < 0]
fac2(x) ->
case x of
0 -> 1;
_ -> x * fac(x-1).
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