Why does my int not print

Question

I'm new to coding Blah Blah same old story but I put this code in:

{
    public static Random Random;

    public int numberOne = 5;
    public int numberTwo = 6;


    public void Run()
    {
        numberOne = Random.Next(0,11);
        numberTwo = Random.Next(0,6);

        Console.WriteLine(numberOne +" + "+ numberTwo);
        Console.ReadKey(true);
    }

numberOne and numberTwo are both public int's. Why doesnt this work?

it comes back with an error stating that

"System.NullReferenceException: Object reference not set to an instance of an object."

What does that mean?

Where is `Random` defined? There is a `Random` class but it is not static. Did you forget to initialize that property? — Mike Zboray, Nov 19 '16 at 22:35

Dmitry Bychenko · Accepted Answer · 2016-11-19T22:53:03.713

1

Let's use my crystal ball: in the code in the question - since numberOne and numberTwo are int - the main possibility to have

System.NullReferenceException: Object reference not set to an instance of an object

is the fragment like this:

// just a declaration without initialization
public static Random Random; // <- the instance doesn't created

...

{
// Addressing Random which is null cause NullReferenceException 
numberOne = Random.Next(0,11);
numberTwo = Random.Next(0,6);

Console.WriteLine(numberOne +" + "+ numberTwo);
Console.ReadKey(true);
}

Remedy: initialize the field with created Random instance

// Now Random is initialized
private static Random Random = new Random();

edited Nov 19 '16 at 22:53

answered Nov 19 '16 at 22:36

Dmitry Bychenko

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ugh my bad you right, it works now thanks :) i miss read what i wrote – deviousPriest Nov 19 '16 at 22:53
@deviousPriest: you've just *declared*, but haven't *initialized* `Random` field with any `Random` inistance. – Dmitry Bychenko Nov 19 '16 at 22:55

Why does my int not print

1 Answers1