C – strupr() function

• strupr( ) function converts a given string into uppercase. Syntax for strupr( ) function is given below.

char *strupr(char *string);

• strupr( ) function is non standard function which may not available in standard library in C.

Example program for strupr() function in C:

• In this program, string ”Modify This String To Upper” is converted into uppercase using strupr( ) function and result is displayed as “MODIFY THIS STRING TO UPPER”.

#include<stdio.h>
#include<string.h>

int main()
{
    char str[ ] = "Modify This String To Upper";

    printf("%s\n",strupr(str));

    return  0;
}

Output:

MODIFY THIS STRING TO UPPER