the beginner

[Matthias Lang]

wicaksono  writes:

 > my file math1.erl as Wiliam Dominic writen. 
 > 
 > -module(math1).
 > -export([factorial/1]).
 > factorial (0) ->1;
 > factorial (N) -> N * factorial (N-1).
 > 
 > one that make me confused, the error point to line 8 but 
 > it only has 4 line :(
 > 
 > I have tried to compile with so many formats ( in space 
 > format), but  it still didn't work.

I suspect the file you're compiling is not the one you've shown
above. Perhaps you're starting the compiler in a different directory
to where the file is.

Here's what happens on my system:

    matthias >cat math1.erl
    -module(math1).
    -export([factorial/1]).
    factorial (0) ->1;
    factorial (N) -> N * factorial (N-1).
    matthias >erl
    Erlang (BEAM) emulator version 5.1.1 [source]
    
    Eshell V5.1.1  (abort with ^G)
    1> c(math1).
    {ok,math1}
    2> math1:factorial(100).
    93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000

i.e. it works exactly as intended.

Matt