Java data types | Zhullyblog

Data types

In this tutorial you will learn about data type.

What is data type?

As the name implies, data type defines the values a variable can hold. This means that it defines the range of value a variable can take.We discussed earlier about variables and learnt that in Java, a variable must be declare and the type of data must be specified.

Types of Data type

• Primitive data types

• Non-primitive data type

PRIMITIVE DATA TYPES

Primitive data type specifies the size of value a variable can hold. Generally, there are eight primitive data types which are :

• Byte

• Short

• Int

• Long

• Double

• Char

• Boolean

But primitive data types are sub-divided into and they are :

• The integer types -- are data types that stores whole number , positive number and negative number only.

• The floating point types -- are data types that stores fractional numbers that is they take decimal numbers.

Now, Leta talk about each of them quickly.

• Byte : This data type stores value from -128 to 127. This means that whatever number you want to store must be between -128 to 127. So, anything value larger than 127 cannot be stored in byte. Hence, it will output error.

public class sample {

public static void main(String[] args) {

byte num;

num = 120;

System.out.println(num);

}

• Short : This data type stores value between -32,768 to 32767.

public class sample {

public static void main(String[] args) {

short num;

num = 140;

System.out.println(num);