[node.js][Resolved] express createServer() not a function

Error Message

 Source Code

var app = require('express').createServer(),
    port = 1337;
    app.listen(port);
app.get('/', function(req, res){
res.send('hello world');
});
console.log('start express server\n');

 Solved Code

var express = require('express'),
    app = express(),
    port = 1337;
app.listen(port);
app.get('/', function(req, res){
res.send('hello world');
});
console.log('start express server\n');

Reference

https://stackoverflow.com/questions/24048271/node-js-express-createserver-not-a-function