99. Check if the String Numeric or Alphabetic

#include <stdio.h>
#include <stdint.h>

void classify_string(const char *str) {
    // Your logic here
    int numeric = 0;
    int alpha = 0;
    int len = 0;

    while(str[len] != '\0')
    {
        if(str[len] >= '0' && str[len] <= '9')
        {
            numeric = 1;
        }
        else if(str[len] >= 'A'&& str[len] <= 'Z' || str[len] >= 'a' && str[len] <= 'z')
        {
            alpha = 1;
        }
        else
        {
            printf("MIXED");
            return;
        }
        len++;
    }
        if(numeric && !alpha)
        {
            printf("NUMERIC");
        }
        else if(!numeric && alpha)
        {
            printf("ALPHABETIC");
        }
        else
        {
            printf("MIXED");
        }
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    classify_string(str);
    return 0;
}