String Function

                 A group of characters defined between double quotation marks is a string. It is a constant string. In C Language, a string variable is nothing but an array of characters and terminated by a null character (\0).

Declaration:

                char    identifier[size];

Eg:    char st[20];

Initialization of string:

                At the time of declaring a string variable, we can store a constant string into that variable is called as initialization.

Syntax:                                       

                char    identifier[size]="string"

Eg:  

                char st1[10]="WELCOME";

                char st2[]="ABCD"; 

                The compiler assigns a constant string to the string variable. It automatically supplied a null character(\0) at the end of the string. Therefore the size should be equal to the maximum number of characters in the string plus(+) 1.

Note:  In C language, string initialization is possible, but string assigning is not possible.

Program:

#include<stdio.h>

#include<conio.h>

void main()

{

    clrscr();

    char st1[10]="WELCOME";

    char st2[]="STREDUTUTS";

    printf("st1 = %s", st1);

    printf("\nst2 = %s", st2);

    getch();

}

Output:

st1 = WELCOME

st2 = STREDUTUTS

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