ex3.1
%% Author: Ehren %% Created: 2009/11/29 %% Description: TODO: Add description to mymath -module(mymath). %% %% Include files %% %% %% Exported Functions %% -export([sum/2, sum/1]). %% %% API Functions %% %% %% TODO: Add description of sum/function_arity %% sum(M,N) when M < N -> M + sum(M+1, N); sum(M,N) when M > N -> {error,"First argument is less than Second argument"}; sum(N,N) -> N. %% %% TODO: Add description of sum/function_arity %% sum(N) when N > 0 -> N + sum(N - 1); sum(0) -> 0.
