Primitive Data Types in Java

in Java, primitive data types are the most basic types of data. They store simple values (not objects) and are very fast.

1. byte

• Size: 1 byte (8 bits)
• Range: -128 to 127
• Used to save memory in large arrays

Example:
byte b = 100;

2. short

• Size: 2 bytes
• Range: -32,768 to 32,767

Example:
short s = 20000;

3. int

• Size: 4 bytes
• Most commonly used
• Range: -2³¹ to 2³¹-1

Example:
int num = 100000;

4. long

• Size: 8 bytes
• Used for very large numbers

Example:
long l = 10000000000L;

5. float

• Size: 4 bytes
• Decimal numbers (less precision)

Example:
float f = 5.75f;

6. double

• Size: 8 bytes
• More precise decimal values

Example:
double d = 19.99;

7. char

• Size: 2 bytes
• Stores single character

Example:
char c = 'A';

8. boolean

• Size: 1 bit (logical)
• Values: true / false

Example:
boolean isJavaFun = true;

Simple Summary Table

Type	Size	Example
byte	1 byte	100
short	2 bytes	20000
int	4 bytes	100000
long	8 bytes	10000000000L
float	4 bytes	5.75f
double	8 bytes	19.99
char	2 bytes	'A'
boolean	1 bit	true