C library function - isxdigit()


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Description

The C library function int isxdigit(int c) checks whether the passed character is a hexadecimal digit.

Declaration

Following is the declaration for isxdigit() function.

int isxdigit(int c);

Parameters

  • c − This is the character to be checked.

Return Value

This function returns a non-zero value(true) if c is a hexadecimal digit else, zero (false).

Example

The following example shows the usage of isxdigit() function.

#include <stdio.h>
#include <ctype.h>

int main()
{
   char var1[] = "tuts";
   char var2[] = "0xE";
  
   if( isxdigit(var1[0]) )
   {
      printf("var1 = |%s| is hexadecimal character\n", var1 );
   }
   else
   {
      printf("var1 = |%s| is not hexadecimal character\n", var1 );
   }
   
   if( isxdigit(var2[0] ))
   {
      printf("var2 = |%s| is hexadecimal character\n", var2 );
   }
   else
   {
      printf("var2 = |%s| is not hexadecimal character\n", var2 );
   }
   
   return(0);
}

Let us compile and run the above program to produce the following result −

var1 = |tuts| is not hexadecimal character
var2 = |0xE| is hexadecimal character

ctype_h.htm

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