Question

How to check if a character is an alphabetic character in C

Answer 1

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

int main(void)
{
    unsigned char ch = 'a'; 

    printf("%d\n", isalpha(ch)); // true

    printf("%d\n", isalpha('9')); // false
    
    printf("%d\n", isalpha('$')); // false
}



/*
run:

2
0
0

*/

 

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