JavaScript Nested Function Example

js-nested-function-example.js

function f() {
  var z = 1;
  function g(y) {
    alert(y + z);
  }
  g(2);
}
f();// calls f and alerts 3

g(2); //ReferenceError: g is not defined
alert(z); //ReferenceError: z is not defined

var x = f; // f is a reference to the function, and now x is too
x(); // calls f or x, it's the same thing, and alerts 3

how to call g()