tambow44

-module(first).
-export([multiply/2,square/1,double/1,treble/1,area/3]).

multiply(X,Y) ->
    X*Y.

square(X) ->
    multiply(X,X).

double(X) ->

tambow44

-module(third).
-export([xor_1/2,xor_2/2,xor_3/2,max_three/3,how_many_equal/3]).

% '=/=' and '==' are the operations for inequality and equality in Erlang
xor_1(X,Y) ->
	(X =/= Y)
.

% 'not' is the Erlang negation function
xor_2(X,Y) ->

tambow44

-module fourth.
-export[fac/1,fib/1,pieces/1].

fac(0) ->
   1;
fac(N) when (N > 0) ->
   fac(N - 1) * N
.

fib(0) ->