Last Question in C Exam Code

c_exam_last_question.c

#include <stdio.h>

int is_alphabet(char letter)
{
    if (letter >= 'a' && letter <= 'z') return 1;
    if (letter >= 'A' && letter <= 'Z') return 1;
    return 0;
    // we don't need else because we are returning
}

int main()
{
    char letter;
    printf("Enter a character: ");
    scanf("%c", &letter);
    
    if (is_alphabet(letter))
        printf("It's an alphabet");
    else
        printf("It's not an alphabet");
    
    return 0;
}