Question

How to check if character is letter in C

Answer 1

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

int main() {
    char s[] = "c programming";
    if (isalpha(s[0])) {
        printf("yes\n");
    } else {
        printf("no\n");
    }
    if (isalpha(s[1])) {
        printf("yes\n");
    } else {
        printf("no\n");
    }

    char ch = 'a';
    if (isalpha(ch)) {
        printf("yes\n");
    } else {
        printf("no\n");
    }
    
    printf("%s", isalpha('z') ? "yes" : "no");

    return 0;
}



/*
run:

no
yes
yes

*/

 

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