Nodejs is an open-source,cross-plateform JavaScript run-time environment for executing JavaScript code server side. Though .js is the conventional f ile extension for JavaScript code, the name "Node.js" does not refer to a particular file in this context and is merely the name of the product. Node.js has an e vent-driven architecture capable of a synchronous I/O . These design choices aim to optimize throughput and scalability in web applications with many input/output operations, as well as for r eal-time web applications Install nodejs download nodejs from click here run : node -v updating npm : npm install npm@latest -g run: npm -v