Primitive Data Types in Java – Complete Guide for Beginners (3 Day Java Course Learn)

Primitive Data Types in Java – Complete Beginner Guide (3 Day Java Course Learn)

Java programming start karte hi sabse pehla concept jo samajhna zaroori hota hai, wo hai Primitive Data Types. Agar aap 3 Day Java Course Learn kar rahe hain, to yeh topic Day 1 ka foundation hai.

Primitive Data Type Kya Hota Hai?

👉 Java Complete Course Series:

• What is Java? – Introduction
• Java Installation Guide
• Primitive Data Types in Java
• Java Variables and Operators
• Java Control Statements

Primitive data types wo basic data types hote hain jo directly memory me value store karte hain. Inke andar object nahi hota, sirf simple value hoti hai.

Java me total 8 Primitive Data Types hote hain.

Java ke 8 Primitive Data Types

Data Type	Size	Range	Use
byte	1 byte	-128 to 127	Small integer values
short	2 byte	-32,768 to 32,767	Medium integer
int	4 byte	-2^31 to 2^31-1	Default integer
long	8 byte	Large integer values	Big numbers
float	4 byte	Decimal number	Small decimal
double	8 byte	Large decimal	Precise decimal
char	2 byte	Single character	Letter store
boolean	1 bit	true/false	Condition check

1️⃣ Integer Data Types

int Example

int age = 25; System.out.println(age);

Java me by default integer ke liye int use hota hai.

long Example

long population = 14000000000L;

2️⃣ Decimal Data Types

float Example

float price = 99.5f;

double Example

double salary = 45678.90;

3️⃣ Character Data Type

char grade = 'A';

Char Unicode support karta hai.

4️⃣ Boolean Data Type

boolean isJavaEasy = true;

Boolean sirf true ya false store karta hai.

Primitive vs Non-Primitive

Primitive	Non-Primitive
Value store karta hai	Reference store karta hai
Fixed size	Dynamic size
No methods	Methods available

Agar aap Non-Primitive Data Types jaise String, Array aur Object ke baare me detail me padhna chahte hain to yaha click karein.

Memory Kaise Work Karti Hai?

Primitive data types Stack memory me store hote hain. Jab variable declare hota hai, tab directly value store hoti hai.

Type Casting

Implicit Casting

int num = 100; double newNum = num;

Explicit Casting

double d = 9.78; int i = (int)d;

Real Life Example

• Age → int
• Salary → double
• Gender → char
• Login status → boolean

Type Casting samajhne ke baad aapko Java Operators bhi samajhna chahiye. Iske liye padhein: Java Operators Complete Guide.

Interview Questions

Q1: Java me kitne primitive data types hote hain?

Answer: 8

Q2: Default integer type kya hota hai?

Answer: int

Q3: Boolean kitni value store karta hai?

Answer: True / False

3 Day Java Course Learn – Day 1 Summary

Aaj aapne seekha:

• Primitive Data Types kya hote hain
• 8 types ke naam
• Size aur range
• Examples
• Type casting

Agar foundation strong hai to Java aapke liye easy ho jayega.

Conclusion

Primitive Data Types Java programming ka base hai. Agar aap beginner hain to is topic ko strong karna bahut zaroori hai.

🚀 3 Day Java Course Navigation:

Day 1 → Primitive Data Types ✔️
Day 2 → Variables + Operators
Day 3 → Control Statements & Loops

Home » Java Course » Primitive Data Types in Java

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