How do I write 10 raised to 9 (10^9) in an if-statement not using Math.Pow? C#

Question

I'm new to this so sorry if this question already have been answered.

I am writing a program in c# and I'm trying to make an if-statement where an integer cannot be higher than 10 raised to 9 (10^9) and not below or equivalent to 0. I tried to search for it and found that I perhaps can use the Math.Pow(10,9) but I don't see how I can do that in the if-statement? Now I have only tried to compile the code while writing a big number, but it's supposed to be 10 raised to 9 and I don't know how to write it?

Here's the code:

if (C > 100000 || C <= 0)

Answer 1

You can use the following code to validate if a number is between 10^9 and 0

  if (Math.Pow(10, 9) >= C &&  C > 0)
      Console.WriteLine("valid");
  else
      Console.WriteLine("Invalid");