JavaScript Data Types with Real Life Examples (For Beginners)

Namaskar dosto!

JavaScript data types ek aisa topic hai jo har beginner ko properly samajhna chahiye. Agar aap JavaScript seekh rahe ho, toh yeh concept aapke programming base ko strong banata hai. Aaj ke is article mein aapko milega ekdum asaan explanation:

JavaScript Data Types Kya Hote Hain?

JavaScript mein data type ka matlab hota hai: kis type ka data aap variable mein store kar rahe ho — jaise number, text, true/false value, ya list.

Simple bhaasha mein: data type batata hai ki variable kis tarah ka data store karega.

Example:

Sochiye aapko ek student ka data store karna hai:

• Student ka naam → Text (String)
• Student ki age → Number
• Kya student active hai? → Boolean

let name = "Aditya";       // String
let age = 20;              // Number
let isActive = true;       // Boolean

JavaScript automatically samajh leta hai ki kis variable ka type kya hai.

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Primitive Data Types (Real Life Examples ke Saath)

Primitive types simple aur basic values ko represent karte hain. Inka size fixed hota hai aur ye directly memory mein store hote hain.

1. Number:
   • Jaise: age, marks, price
   • Example: let price = 99;
2. String:
   • Text value jaise naam, address
   • Example: let city = "Ahmedabad";
3. Boolean:
   • True ya False jaise conditions
   • Example: let isOnline = true;
4. Undefined:
   • Variable declared hai, but value assign nahi hui
   • Example: let score;
5. Null:
   • Jab hum khud variable ki value “kuch nahi” set karte hain
   • Example: let response = null;

Real Life Example:

Aapka ID card:

• Naam (String)
• Age (Number)
• Student status (Boolean)

Aap JavaScript ke primitive data types ka official definition MDN Web Docs par padh sakte ho.

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Non-Primitive Data Types (Object, Array, Function)

Yeh complex data structures hote hain jo multiple values ko ek sath organize karte hain. Inhe reference types bhi kaha jata hai.

1. Object:
   • Key-Value pairs mein data store hota hai.
   • Example:

let student = {
  name: "Aditya",
  age: 20,
  class: "BCA"
};

2. Array:
   • Similar type ke data ka collection
   • Example:

let subjects = ["Math", "JS", "English"];

3. Function:
   • Code block jo specific task perform karta hai
   • Example:

function greet() {
  console.log("Hello!");
}
greet();

Real Life Example:

Sochiye aapka school register — har student ka data ek object hai, subjects array mein, aur attendance check karne ke liye function.

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Primitive vs Non-Primitive Data Types ka Difference

Feature	Primitive	Non-Primitive
Value	Directly stored	Reference se stored
Size	Fixed	Variable
Examples	Number, String, Boolean	Object, Array, Function
Complexity	Simple	Complex

Short mein: Primitive types fast aur simple hote hain, jabki Non-Primitive types zyada powerful hote hain complex data ke liye.

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FAQs (Frequently Asked Questions)

Dosto Advanced explanation ke liye aap JavaScript Info ka article dekh sakte ho.

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Conclusion

Toh dosto, aaj ke article se aapne samjha ki JavaScript mein data types kya hote hain, unke examples kya hote hain aur kaise primitive & non-primitive data types kaam karte hain. Practice karte rahiye — tabhi concept strong banega!

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Next Article Zaroor Padhein:

• JavaScript Operators in Hinglish – 2025 Guide
• JavaScript Variables: var, let, const Explained

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Written by: Aditya (Programming Sikho)