Check if the String Numeric or Alphabetic

Code

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

void classify_string(const char *str) {
    // Your logic here
    bool numeric_flag=0;
    bool alphabet_flag=0;
    int i=0;
    while(str[i]!='\0')
    {
        if(str[i]>='0' && str[i]<='9')
            numeric_flag=1;
        else if ((str[i]>='a' && str[i]<='z')|| (str[i]>='A' && str[i]<='Z'))
            alphabet_flag=1;
        else 
        {
            printf("MIXED");
            return;
        }
        i++;
    }
    if(numeric_flag==1 && alphabet_flag==0)
            printf("NUMERIC");

    if(numeric_flag==0 && alphabet_flag==1)
            printf("ALPHABETIC");
    
    if(numeric_flag==1 && alphabet_flag==1)
            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