C Progran to illustrate the use Of Macros

#include<stdio.h>
#define ISLOWER(c) (c>=97&&c<=122)

#define ISUPPER(c) (c>=65&&c<=90)
#define ISALPHA(c) ISLOWER(c) || ISUPPER(c)

int main()
{
char chr;

printf("Enter a character:\n");
scanf("%c",&chr);

if (ISALPHA(chr) )
{
printf("%c is an alphabetical character.\n",chr);
}
else
{
printf("%c is not an alphabetical character.\n",chr);
}

return 0;
}