Node.js is a platform built on the Chrome JavaScript runtime.
Node.js is an event-driven I/O server-side JavaScript environment based on Google's V8 engine. The V8 engine executes Javascript very quickly and has very good performance.
Node.js functions syntax
In JavaScript, a function can be used as a parameter of another function. We can define a function first and then pass it, or we can define the function directly where the parameters are passed.
Node.js functions example
function say(word)
{ console.log(word);}
function execute(someFunction, value)
{ someFunction(value);}
execute(say, "Hello");