Check if the String Numeric or Alphabetic

Code

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

void classify_string(const char *str) {
    // Your logic here
    int n=strlen(str);
    int num=0,alpha=0;
    for(int i=0;i<n;i++)
    {
        if(str[i]>='0'&&str[i]<='9')
        num++;
        if((str[i]>='A'&&str[i]<='Z')||(str[i]>='a'&&str[i]<='z'))
        alpha++;
    }
    if(num==n)
    printf("NUMERIC");
    else if(alpha==n)
    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