exports.validate = function(num){
  var reg = /^\d+$/;
  if(reg.test(num)){
    return num;
  }
  else{
    return "Is Not Valid";
  }
}

@@ -101,23 +101,28 @@
 se%7B%0A    
-return 
+console.log(
 %22Is Not 
@@ -127,16 +127,17 @@
 t Valid%22
+)
 ;%0A  %7D%0A%7D%0A

update file