Use iswalpha function check if a wide character is a letter

Syntax

C iswalpha function has the following syntax.

Header

C iswalpha function is from header file wctype.h.

Description

C iswalpha function returns nonzero if wide character ch is a letter or zero if not.

Example

Use C iswalpha function to tell if it is a wide character a letter.

#include <stdio.h>
#include <wctype.h>
/*from  w w  w  . j  a  va  2  s .  c om*/
int main(void)
{
   int wc;

   for (wc=0; wc <= 0xFF; wc++) {
      printf("%3d", wc);
      printf(" %#4x ", wc);
      printf("%2s", iswalpha(wc)  ? "A"  : " ");


      putchar('\n');
   }
}

The code above generates the following result.