Finishing code project on area of a circle

Question

I simply can't create the output. As in, I've created an output but can't figure out how to display it. Have I missed a tutorial?

This is the 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;

if (args.Length == 0)
{
return;
}

radius = Convert.ToInt32(args[0]);

double circleArea = pi * radius * radius;

// Console.WriteLine(circleArea);
// MessageBox.Show(circleArea);
// Debug.WriteLine(circleArea);
}
}
}

Answer 1

Console.WriteLine(circleArea) ;

But in Sololearn, it not work on input by main argument passing.. ..

You should take input by
radius = double.Parse( Console.ReadLine() ) ;

edit:
Jannick Breunis
remove if block , as it cause return.

Answer 2

Your code is here...
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*radius);
}}}

Answer 3

Yes that's it! Question answered. Thanks both!

Answer 4

Ah ofcourse.. Changed the int-conversion (facepalm) too:

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;

if (args.Length == 0)
{
return;
}

radius = double.Parse(Console.ReadLine());
double circleArea = pi * radius * radius;

Console.WriteLine(circleArea);
// MessageBox.Show(circleArea);
// Debug.WriteLine(circleArea);
}
}
}

But still getting "Your Output No Output"

Answer 5

Sololearn does not have args.

if args length = 0 return. So the code exits in the first if statement.

For the code coach problem the input values are filled in automatically. Just Console.Readine and string to double conversion, should be Ok.

Tนktนk💕 Your code is the correct code.