node.js, Error: Cannot find module 'express'

Question

I am new to Node.js, try to learn express to build my first web application. I got stuck on my very first sample code and need some help to get it running. Before I post this question, I did search on stack overflow, found some similar questions but still could not fix it. ``` Error: Cannot find module 'express' ``` I am using mac os 10.8.2. I have Node.js installed using `nvm`. ``` node.js: 0.8.20 path to node: /Users/feelexit/nvm/v0.8.20/bin/node path to express: /Users/feelexit/nvm/node_modules/express ``` here's my sample code: this file locates at: /Users/feelexit/WebstormProjects/learnnode/node_modules/index.js ``` var express = require('express'); var app = express(); app.get('/', function(req, res){ res.send('welcome to express'); }); app.listen(3000); ``` when I try to run this command `node index.js` I get following error message, please help me to fix it. Thank you. ``` Error: Cannot find module 'express' at Function.Module._resolveFilename (module.js:338:15) at Function.Mo…

Accepted Answer

It says

```
Cannot find module 'express'
```

Do you have express installed? If not then run this.

```
npm install express
```

and run your program again.

node.js, Error: Cannot find module 'express'

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