Question how make a function and recover the return value ?

[AlamaFromBe]

Hello everyone, I'm coming to you for a question that will probably seem silly to you, But I can't do a simple method (function) that returns an object and especially to retrieve it in the calling function. Kind:

int result = int myFunc () {return 25};

Or:

using System;
                  
public class Program
{
  
    public static void Main()
    {
        int result = int myFunc();
        Console.WriteLine(result);
    }
  
    int myFunc()
    {
        // Code à exécuter quand la méthode est appelée.
        return 12;
    }
}

I specify that I seek, but did not find a clear and precise answer.

 

[JohnH]

You are trying to call an instance method from a static method without an instance. Try changing your function to static also.

static modifier - C# reference

static modifier - C# Reference

docs.microsoft.com

 

[AlamaFromBe]

You are trying to call an instance method from a static method without an instance. Try changing your function to static also.

static modifier - C# reference

static modifier - C# Reference

docs.microsoft.com

Hi John, verry thanks for your speedy reply, i' come from AS3 language, i'm verry noob in C#.
Too much that I don't understand, like for example, why it has to be static, I thought that static was only to make classes usable directly without the need for an instance. But hey, I imagine that I will eventually understand .. Thanks again.

 

[JohnH]

Your Main method is static so it doesn't know about instance members of the Program class. If you for example place it in a separate class like this:

public class Utils
{
    public int MyFunc()
    {
        return 12;
    }
}

Then you can in your static Main method create an instance of that class and call the instance method like this:

var util = new Utils();
var result = util.MyFunc();
Console.WriteLine(result);

 

[Skydiver]

As a quick aside, in C# (and Java), they are called methods. It's C and C++ which call them functions.

 

[JohnH]

As a quick aside, in C# (and Java), they are called methods. It's C and C++ which call them functions.

...and noone knows how this got there: Local functions - C# Programming Guide

 

[Skydiver]

To quote the second sentence in that link:

Local functions are private methods of a type that are nested in another member.