C# code error

Question

I have the following piece of code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
const double pi = 3.14;
double radius;
radius=Convert.ToDouble(Console.ReadLine());
Console.WriteLine(pi*(radius**2));
}
}
}

When I run it, it shows up error CS0193 for line 16 (the Console.WriteLine...). It says that 'the * or -> operator must be applied to a pointer'. Two questions: what exactly IS a pointer, and why does this error show up (and how do I solve it?).

Thanks in advance

Answer 1

So is ** not a viable operator in C#?

Answer 2

https://www.sololearn.com/Discuss/2890056/can-some-one-please-help-me-to-solve-this-one

Answer 3

Try it this way:
Console.WriteLine(pi*(radius*radius));

Answer 4

Or, you have to use Math.Pow() like this

"Math.Pow(radius, 2)"

Answer 5

Thank you!

Answer 6

Thank you, it worked! Is it possible for me to know why that error occurs?

Answer 7

That's because you can't square a number with **