Variable

In Java, all variables must be declared before they can be used. The basic form of a variable declaration is shown here:

Syntax:

                datatype identifier = value(if initialized)

same as,

             int a = 2;

The identifier is the name of the variable. To declare more than one variable of the specified type, use a comma-separated list.

Here are several examples of variable declarations of various types. Note that some include an initialization.

int a, b,c;                         // declare three int a, b and c.

int d=2, e=4, f=6;            // declare three more variables.

                                     // and initializing d and f.

byte z=22;                     // declare and initializes z.

double pi = 3.14159;       // double and float are used to store decimal values.

char x = 'x';                   // declare char and the value stored in

                                   // it will b a character.

String name = "Admin"   // String is not a datatype, it is a class but it is

                                  // used as a datatype.