Fundamental of C

About Variable

A variable is a name location of memory where data will be store and manipulated during runtime.

A variable  is a container that is used for store a value.

Syntax:- to defined a variable

<storage specifier> <modifier> <qualifier> datatype variablename=[value], variable2,………;

 

NOTE:-   

(i)                 A storage specifier, modifier or qualifier are optional with variable definition statement. It can be used if needed.

Datatype                         Modifier                         Storage specifier                            Qualifier

void                             signed                                     auto                                        const

char                             unsigned                                 static                                       variable

int                               short                                       extern

float                            long                                         register

double                                   

Example:- int a;

(ii)               A variable may be initialized by a value at definition time.

Example:- int a=20;

(iii)             More than one similar type variable may be defined into single line separated by comma.

Example:- int a=10,b;