isxdigit() - Character Function

isxdigit() is used to check if the argument is a hexadecimal characters in the range A-F,a-f,or 0-9. Those are "0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F". If the argument does not have a them, the function returns Zero.

Syntax:

Example :

#include <stdio.h> #include <stdlib.h> #include <ctype.h> char str[] = { 'B', 'a','0', '@' }; #define SIZE sizeof( str ) / sizeof( char ) int main( void ) { int j; for( j = 0; j < SIZE; j++ ) { if( isxdigit( str[j] ) ) { printf( "Char %c is a hexadecimal digit\n",str[j] ); } else { printf( "Char %c is not a hexadecimal digit\n",str[j] ); } } return 0; }

Result :
In the above example, this function is used to check for hexadecimal characters in an array "str". In the array, all the digits are checked and correspondingly they are displayed.