Convert Integer to Hex String Without sprintf or itoa functions

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

void print_hex(uint16_t num) {

    int arr[16] = {0};
    int i = 0;
    if(num == 0){
        printf("0");
        return;
    }
    while (num)
    {
        arr[i++] = num % 16;
        num /= 16;
    }
    i--;
    for(; i >= 0; i--){
        if(arr[i] == 10) printf("A");
        else if(arr[i] == 11) printf("B");
        else if(arr[i] == 12) printf("C");
        else if(arr[i] == 13) printf("D");
        else if(arr[i] == 14) printf("E");
        else if(arr[i] == 15) printf("F");
        else printf("%u", arr[i]);
    }
    
    
}

int main() {
    uint16_t num;
    scanf("%hu", &num);
    print_hex(num);
    return 0;
}