Check if the String Numeric or Alphabetic

Code

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

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