C PROGRAM TO FIND WETHER THE GIVEN CHARACTER IS AN ALPHABET OR NOT

#include<stdio.h>
int main()
{
    char ch;
    printf("Enter a character : ");
    scanf("%c",&ch);
    if( (ch>='a'&& ch<='z') || (ch>='A' && ch<='Z'))
       printf("%c is an alphabet.",ch);
    else
       printf("%c is not an alphabet.",ch);
    return 0;
}

OUTPUT

Enter a character : d
d is an alphabet.