update,

task1/SCC_212_Advanced_Programming_Weeks_7/recursion.erl

@@ -0,0 +1,9 @@
+-module(recursion). 
+-export([fac/1,start/0]). 
+
+fac(N) when N == 0 -> 1; 
+fac(N) when N > 0 -> N*fac(N-1). 
+
+start() -> 
+   X = fac(4), 
+   io:fwrite("~w",[X]).