ADDED: IMPORTED SUM MODULE

Imported sum module

Author: learneradarsh

sum_controller.js

@@ -1 +1,10 @@
 
+let sum = require("./sum");
+
+let err1 = sum();
+let err2 = sum(2);
+let err3 = sum("abc", 2);
+let err4 = sum("", 2);
+let good = sum(2, 4);
+
+console.log("Res: " + good);