Initial data commit

Task/Variables/E/variables-3.e

@@ -0,0 +1,7 @@
+def var x := 1
+x += 1                # equivalent to x := x + 1, or x := x.add(1)
+x                     # returns 2
+
+def var list := ["x"]
+list with= "y"        # equivalent to list := list.with("y")
+list                  # returns ["x", "y"]