Check if the String Numeric or Alphabetic

Code

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

void classify_string(const char *str) {
    // Your logic here
    uint8_t numeric = 0;
    uint8_t alpha = 0; 

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

    if(numeric && alpha){
        printf("MIXED");
    }else if(numeric && !alpha){
        printf("NUMERIC");
    }else if(alpha && !numeric){
        printf("ALPHABETIC");
    }

}

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