Convert Uppercase Letters to Lowercase

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

void to_lowercase(char *str) {
    // Your logic here
    if (!str || str == NULL) return;
    uint8_t read = 0;

    while (str[read] != '\0') {
        if (str[read] >= 'A' && str[read] <= 'Z') {
            str[read] += 32;
        } else {

        }
        read++;
    }
    str[read] = '\0';
}

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++;
    }

    to_lowercase(str);
    printf("%s", str);
    return 0;
}