Add Data in Object

 Add Data in Object

Code:

var user = { name: "hera", roll: 141168 }

user;

{name: 'hera', roll: 141168}

user.name

//'hera'

user.age = 21;

//21

user

{name: 'hera', roll: 141168, age: 21}  // in last age: 21 is add now