Data Types in Java

Java is a strongly typed programming language. Therefore, you have to mention the type of value before compilation otherwise, you will get a compile-time error.

There are mainly two type of data:

• Primitive data type
• Non- primitive data type

Primitive data type are divided into following parts:

• Integer
• byte : size 1byte | range (-128 to 127)
• short : size 2bytes | range (-32768 to 32767)
• int : size 4 bytes | range (-2147483648 to 2147483647)
• long : size 8 bytes | range (-9223372036854775808 to 9223372036854775807)
• Decimal Numbers
• float: size 4 bytes

float f = 3.3333333f        

Float values must be created with the suffix F or f. When after decimal you add digit upto 7 then it comes under float data type. but as soon as number goes beyond 7 digit then our value comes under double.

• double: size 8 bytes

double d = 3.33333333d        

• char: size : 2bytes

we can store alphabates, numerical, special character.

• boolean: size: 1 bit

In java there is no concept of range to boolean datatype.