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

public bool IsAscendingOrder(int num)
{
    bool result = true;
    int remainder = 0;
    int lastNumber = num % 10;
    num /= 10;
    
    while (num != 0)
    {
        remainder = num % 10;
        if (remainder < lastNumber)
            result = false;
        lastNumber = remainder;
        num /= 10;
    }
    return result;
}