What do you understand by variable
Answer : Java variable is basically use as unit of storage in program. A variable is defined by the combination of type, identifier and an optional initializer. When we define the variables the they all have a scope, which defines their visibility, and a lifetime.
Variable declaration:
All variables should be declared before they can be used. The basic form of a variable declaration is shown below:
type identifier [ = value][, identifier [= value] ...] ; long a, b, c; // declares three long variable a, b, and c long d = 10, e, f = 20; // declares again and initializing // d and f. byte z = 22; // initializes z double pi = 3.14159; // declares an approximation of pi. char x = 'x'; // the variable x has the value 'x'.
