static void isNum()
{
ItMath ItMath = new ItMath();
while (true)
{
string input = Console.ReadLine();
System.Console.WriteLine("input is a number: " + ItMath.OnkoLuku(input));
}
}
static void isDate()
{
ItMath ItMath = new ItMath();
while (true)
{
System.Console.WriteLine("Please input a date: ");
string input = Console.ReadLine();
System.Console.WriteLine("input is a date: " + ItMath.OnkoPvm(input));
input = "";
}
}
