Variable

Variable is a named memory location which can store some value & it can change n number of times during execution.

Variables are of two types:

1. Primitive type
2. Non-primitive type

Variable Declaration:

Syntax: datatype variable_name;

Example: int a;

Variable Initialization:

Syntax: variable_name=value;

Example: a=10;

Variable Utilization:

Example: System.out.println(a);

Variable Reinitialization:

Example: int a=30;

a=50;

Copy value from one variable to another variable:

int a=40;

int b=a;

System.out.println(b);

Variable declaration & initialization in a single line:

int a=80;