Debugging Code

Reference Error

module.exports.hello = function(msg) {
  return "Hello " + msg;
};

Reference Error 2

module.exports.hello = function(first, last) {
  return "Hello " + first + " " + last;
};

Unexpected Token

module.exports.hello = function() {
  return "Hello World";
};

Console log

module.exports.add = function(a,b) {
  return a*b;
};