Check if the String Numeric or Alphabetic

Code

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

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

    while(*str != '\0'){
        if(*str >= '0' && *str <='9'){
            numeric = 1;
        }
        else if((*str >= 'a' && *str <='z') || (*str >= 'A' && *str <='Z')){
            alpha = 1;
        }else{
            sym = 1;
        }
        str++;
    }
    if(numeric == 1 && alpha == 0 && sym == 0) printf("NUMERIC");
    else if(numeric == 0 && alpha == 1 && sym == 0) 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;
}

Solving Approach