what is JS Closures? code example

Example 1: javascript closure

function init() {
  var name = 'Mozilla'; // name is a local variable created by init
  function displayName() { // displayName() is the inner function, a closure
    alert(name); // use variable declared in the parent function
  }
  displayName();
}
init();

Example 2: closure in javascript

A closure is a function bundeled together with its lexical scope