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    <p>This has already been answered but I wanted to add some clarification...</p> <p>You can use both <code>exports</code> and <code>module.exports</code> to import code into your application like this:</p> <p><code>var mycode = require('./path/to/mycode');</code></p> <p>The basic use case you'll see (e.g. in ExpressJS example code) is that you set properties on the <code>exports</code> object in a .js file that you then import using <code>require()</code></p> <p>So in a simple counting example, you could have:</p> <p>(counter.js):</p> <pre><code>var count = 1; exports.increment = function() { count++; }; exports.getCount = function() { return count; }; </code></pre> <p>... then in your application (web.js, or really any other .js file):</p> <pre><code>var counting = require('./counter.js'); console.log(counting.getCount()); // 1 counting.increment(); console.log(counting.getCount()); // 2 </code></pre> <p>In simple terms, you can think of required files as functions that return a single object, and you can add properties (strings, numbers, arrays, functions, anything) to the object that's returned by setting them on <code>exports</code>.</p> <p>Sometimes you'll want the object returned from a <code>require()</code> call to be a function you can call, rather than just an object with properties. In that case you need to also set <code>module.exports</code>, like this:</p> <p>(sayhello.js):</p> <pre><code>module.exports = exports = function() { console.log("Hello World!"); }; </code></pre> <p>(app.js):</p> <pre><code>var sayHello = require('./sayhello.js'); sayHello(); // "Hello World!" </code></pre> <p>The difference between exports and module.exports is explained better in <a href="https://stackoverflow.com/questions/7137397/module-exports-vs-exports-in-nodejs">this answer here</a>.</p>
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    1. POWhat is the purpose of Node.js module.exports and how do you use it?
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    1. COhow can I call require some module from other folder which is not having the some root folder as mine ?
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    2. CO@user301639 you can use relative paths to traverse the file system hierarchy. `require` starts relative to the folder you execute `node app.js` in. I recommend you post a new question with explicit code + folder structure examples to get a clearer answer.
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