write a function to receive a whole number and return true if the digits are in ascending order from right to left do not use string

int num = 123;

int n = num;
int prev_digit = n % 10;
n /= 10;

while (n > 0)
{
    int curr_digit = n % 10;

    if (curr_digit > prev_digit)
        return false;

    prev_digit = curr_digit;
    n /= 10;
}

return true;