Fundamentals of Java|Data types.

In this article,what are Fundamentals of Java|Data types? is explained in detail with examples.
In software engineering and PC programming, a data type is an order of information which tells the compiler or interpreter how the developer expects to utilise the information. Most programming holds different types of information, for instance: real, integer or Boolean. A Fundamentals of Java|Data types, data type gives an arrangement of qualities from which an expression (i.e. variable, work ...) may take its qualities. The type characterises the operations that should be possible on the information, the significance of the information, and the way estimations of that sort can be put away.
The Data which is processed in a program to perform some operations is represented by data types.
Java supports two types of  data types. (From the topic what are Fundamentals of Java|Data types)
Fundamentals of Java|Data types-javaform
Primitive Datatypes
type of data types, Size, the range of the primitive data types are
1 Byte=8 bits.
A byte is represented by “B”, a bit is represented by “b”.

Primitive datatypes
Datatype
Size
Range
Byte
1B (1B=8b)
-128 to +127
Short
2B (16b)
-32768 to +32767
Int
4B (32b)
-2,147,483,648 to +2,147,483,647
Long
8B (64b)
±3.40282347E+38F 
Float
4B
1.4E-45 to 3.4E+38
Double
8B
4.9E-324 to 1.8E+308
Char
2B
0 to 65535
Boolean
1b
True(1)/False(0)

*Points to remember
  • By default, any integer constant is int data type value. Byte, Short, Int, Long these four data types come under Int data types. (from the topic what are Fundamentals of Java|Data types)
  • Float, Double comes under floating/real data types. By default floating constant is double.
         Ex: In java, if a value is assigned to a variable by default it assumes its datatype as double.   

                "double x=5.63;".
                to define it as float we need to write it as "float x=5.63f;".
  • Java supports the concept of "Unicode" which is upgraded concept of ASCII codes. i.e. Java supports characters from different languages across the world with a unique code.
  • Java does not support the concept of signed,unsigned keywords,format specifiers related to data types.
Continue to next topic Declaring variables in Java.

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