Initial data commit

Task/Loops-For/Sather/loops-for.sa

@@ -0,0 +1,20 @@
+class MAIN is
+  -- from, to, step
+  for!(once init:INT, once to:INT, once inc:INT):INT is
+    i ::= init;
+    loop while!( i <= to );
+      yield i;
+      i := i + inc;
+    end;
+  end;
+
+  main is
+    i, j :INT;
+    loop i := for!(1, 5, 1);   -- 1.upto!(5)
+      loop j := for!(1, i, 1); -- 1.upto!(i)
+        #OUT + "*";
+      end;
+      #OUT + "\n";
+    end;
+  end;
+end;