Category: javascript
what is object
Published on 16 Jul 2026
Explanation
Objects store data as key-value pairs and represent real-world entities.
Code:
const student = {
name: 'John',
age: 22
};
Explanation
Object properties can be accessed using dot notation or bracket notation.
Code:
console.log(student.name); console.log(student['age']);
Explanation
New properties can be added or existing properties updated.
Code:
student.city = 'Chennai'; student.age = 23;
Explanation
The delete keyword removes a property from an object.
Code:
delete student.city;
Explanation
Object.keys() and Object.values() return property names and values.
Code:
console.log(Object.keys(student)); console.log(Object.values(student));