objects.js

//Non primitive datatypes are always returened as objects in JavaScript. Objects are mutable and are stored as reference types. When we assign an object to a variable, we are actually assigning a reference to that object in memory. This means that if we change the object through one variable, it will affect all variables that reference that same objecta.

const studentDetails = {
    id : 1,
    name : "Jibin",
    age : 40,
}

console.log(studentDetails);
console.log(typeof(studentDetails));

console.log(studentDetails.name);

console.log(studentDetails['age']);

//To add a additional object

studentDetails.grade = "A";

console.log(studentDetails);

//To update the existing object grade to A+

studentDetails['grade'] = "A+";

console.log(studentDetails);

studentDetails['age'] = 41;

console.log(studentDetails);

// if a new variable is created without var/let at a later stage of the code, it will violate the strict mode rule.

//-------------------------

// Arrays