C# code not working in Unity

Question

I have just started learning the language C# from the book "Learning C# by Developing Games with Unity 3d". I have been working through the book fine up until page 47 when it gives me the following code.

using UnityEngine;
using System.Collections;

public class LearnScript : MonoBehaviour 
{
    public int number1 = 2;
    public int number2 = 3;
    public int number3 = 4;


    void start()
    {
        AddTwoNumbers(number1, number2);
        AddTwoNumbers(number1, number3);
        AddTwoNumbers(number2, number3);
    }

    void update()
    {

    }

    void AddTwoNumbers (int firstNumber, int secondNumber)
    {
        int result = firstNumber + secondNumber;
        Debug.Log(result);
    }
}

What the book says it is meant to do is output the answers to the AddTwoNumbers method, but when I click play on unity the console is empty.

I have attached the code to the main camera so that shouldn't be a problem there. If someone can tell me what I am doing wrong it would be appreciated. I don't want to move on with the book until I get this little bit of code to work. If it makes any difference I am using Unity version 5.2.3.

well... weird. looks right except for the case letters. try Start() and Update(), and make sure it is attached on some object in the scene! — ゴスエンヘンリ
– ゴスエンヘンリ, Commented Dec 2, 2015 at 20:36
In this case, it would be start() as the code snippet does not show Start().. — ryekayo
– ryekayo, Commented Dec 2, 2015 at 20:39
@ゴスエンヘンリ Thanks a lot for the help. I never realised the names had to be in caps — Flukiercobra41
– Flukiercobra41, Commented Dec 2, 2015 at 20:42

ErikE · Accepted Answer · 2015-12-02 20:46:41Z

9

First, make sure this is attached to some object in the scene.

Second, rename:

void Start()
{
    AddTwoNumbers(number1, number2);
    AddTwoNumbers(number1, number3);
    AddTwoNumbers(number2, number3);
}

Start(), not start().

Also it is Update(), not update().

C# is case sensitive.

edited Dec 2, 2015 at 20:46

ErikE

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answered Dec 2, 2015 at 20:41

ゴスエンヘンリ

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1 Comment

Flukiercobra41 Over a year ago

Thanks alot for the help

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