QN002. Write a program which accept and print all basic data types of Java.

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1. Objective

To see the use of all basic data types of Java.

2. Theory

Data types specify the different sizes and values that can be stored in the variable. There are two types of data types in Java.

1. Primitive Data Types
2. Non-Primitive Data Types

In this program we only look after primitive data types. Primitive data types are the building blocks of data manipulation. There are 8 types of primitive data types in Java.

Data Type	Default Value	Default Size
boolean	false	1 bit
byte	0	1 byte
char	'\u0000'	2 byte
short	0	2 byte
int	0	4 byte
long	0l	8 byte
float	0.0f	4 byte
double	0.0d	8 byte

3. Source Code

public class Qn002{
public static void main(String[] args){
//boolean
boolean b = true;
System.out.println("boolean: " + b);

//byte
byte a = 127;

// byte is 8 bit value
System.out.println("byte: " + a);

//char
char ch = 'S';
System.out.println("char: " + ch);

//Short
short sh = 306;
System.out.println("short: " + sh);

//int
int num = 999;
System.out.println("int: " + num);

//long
long lon = 25362814;
System.out.println("long: " + lon);

//float
float fl = 4.1416197f;
System.out.println("float: " + fl);

//double
double value= 25.264897456;
System.out.println("double: " + value);
}
}

4. Output

boolean: ture
byte: 127
char: S
short: 306
int: 999
long: 25362814
float: 4.141697
double: 25.264897456

5. Conclusion

In this way, I would like to conclude that we can use any of primite data types according to the type of data we want to store. For example, if we have to store integer number 50 byte would be the best choice for this. Because byte can hold integer value from -128 to 127.