Created
August 23, 2018 01:55
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Fast exponentiation in Erlang
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| -module(power). | |
| -export([pow/2]). | |
| pow(A, B) -> pow(A, B, 1). | |
| pow(_, 0, C) -> C; | |
| pow(A, B, C) when B rem 2 == 1 -> pow(A, B-1, A*C); | |
| pow(A, B, C) -> pow(A*A, B div 2, C). |
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