Check if the String Numeric or Alphabetic

Code

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

void classify_string(const char *str) {
    // Your logic here
    bool isdigit = false;  
    bool isalpha = false; 
    bool other = false; 
    for(int i = 0; str[i] != '\0';i++)
    {
        if(str[i] >= 48 && str[i] <= 57)
            isdigit = true; 
        else if((str[i] >= 65 && str[i] <= 90) || (str[i] >=97 && str[i] <= 122))
            isalpha = true;
        else
            other = true; 
    }
    if(isdigit && !isalpha && !other)
        printf("NUMERIC");
    else if(isalpha && !isdigit && !other)
        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