datahiding.js

//Data Hiding / Encapsulation by closure 
//Encapsulating the data and providing access to it through methods.
//Example :

function dataout() {
    var a = 100;
    function datahide() {
        a++;
        console.log(a);
    }
    return datahide;
}
var dt = dataout();
dt();

var dt1 = dataout();
dt1();
dt1();