Primitive Data Types

Primitive data types

• Primitive data type represents the values of integers (without decimals), floating point (with decimals), character, boolean.
• Primitive data types are 8

                1) byte

                2) short

                3) int

                4) long

                5) float

                6) double

                7) char

                8) boolean (true, false)

These 8 separated in 4 categories:

1.   Integral

byte, short, int, long

2.   floating

float, double

3.   character

char

4.   boolean

boolean     

Integral data types :To represent values without decimals

Type	Size in Bytes	Range
byte	1 byte	-128 to 127
short	2 bytes	-32,768 to 32,767
int	4 bytes	-2,147,483,648 to 2,147,483, 647
long	8 bytes	-9,223,372,036,854,775,808 to    9,223,372,036,854,775,807

Examples: 

        byte  a = 10;

        short b = 20;

        int d    = 30;

        long e  = 40;

byte, short, int, long         →     all these are data types

a, b, c, d                          →     all these are variables names.

10, 20, 30, 40                  →     all these are values        

 ;                                                       →        This is symbol of semicolon

100% Fact : 

Always datatype and variable will work together in programming. These couple of things will play major role. In upcoming chapter we will learn about variables and values

Floating point data type : To represent values with decimals

Type	Size in Bytes	Range
float	4 bytes	-3.40282347E+38F to                      -3.40282347E+38F   (6-7 significant decimal digits)
double	8 bytes	-1.79769313486231570E+308 to         ±1.79769313486231570E+308    (15 significant decimal digits)

Examples:

        float g = 1.23f;

        double h = 1.234d;

       

float, double             →     all these are data types

g, h                         →     all these are variables names.

1.23, 1.23                →     all these are values

 ;                                           →       This is symbol of semicolon

  

character data type :  To represent character values  

Type	Size in Bytes	Range
char	2 byte	0 to 65,536 (unsigned)

Examples:

        char i = 'a';

       

char                         →     This is char data type

i                             →     here i is a variable name.

a                            →     here a is a value

;                                         →       This is symbol of semicolon

boolean data types : To represent true or false values

Type	Size in Bytes	Range
boolean	Not applicable	true or false

Examples:

        boolean status1 = true;

        boolean status2 = false;

       

boolean                     →    This is boolean data type

status1, status2       →    here k is a variable name.

;                                            →      This is symbol of semicolon

Thanks for your time.

Nireekshan