Convert Uppercase Letters to Lowercase

Code

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

void to_lowercase(char *str) {
    
    char temp = 0;
    uint8_t i;
    char Uppercase = 'A';
    char Lowercase = 'a';

    for(i=0;str[i] != '\0';i++){
        temp = str[i];
        if((temp >='A') && (temp <='Z')){
while(1){
    if(temp == Uppercase)
break;
Uppercase++;
Lowercase++;
}

str[i] = (Lowercase);
        }

    }
}

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;
}

Solving Approach