Initial data commit

Task/Factorial/Sather/factorial.sa

@@ -0,0 +1,20 @@
+class MAIN is
+
+  -- recursive
+  fact(a: INTI):INTI is
+    if a < 1.inti then return 1.inti; end;
+    return a * fact(a - 1.inti);
+  end;
+
+  -- iterative
+  fact_iter(a:INTI):INTI is
+    s ::= 1.inti;
+    loop s := s * a.downto!(1.inti); end;
+    return s;
+  end;
+
+  main is
+    a :INTI := 10.inti;
+    #OUT + fact(a) + " = " + fact_iter(a) + "\n";
+  end;
+end;