Help me please: Errors

Questions & Answers
1

Hi, can you help me please?
I have problem, with this script:

using UnityEngine;
using System.Collections;

public class Controller : MonoBehaviour {

    void Update()
    {
        // Get the rigidbody component
        r2d = GetComponent<Rigidbody2D>;

        // Move the spaceship when an arrow key is pressed
        if (Input.GetKey("right"))
            r2d.velocity.x = 10;
        else if (Input.GetKey("left"))
            r2d.velocity.x = -10;
        else
            r2d.velocity.x = 0;
    }
}

Unity is write this errors:
Assets/Controller.cs(9,9): error CS0103: The name r2d' does not exist in the current context Assets/Controller.cs(13,13): error CS0103: The name r2d’ does not exist in the current context
Assets/Controller.cs(15,13): error CS0103: The name r2d' does not exist in the current context Assets/Controller.cs(17,13): error CS0103: The name r2d’ does not exist in the current context

2

void Update()
{
// Get the rigidbody component
r2d = GetComponent;

should be

 void Update()
 {
     // Get the rigidbody component
     Rigidbody2D r2d = GetComponent<Rigidbody2D>;

When defining a variable you have to tell unity what type of variable it is, r2d is a Rigidbody2D.

You can also define it above your methods

 private Rigidbody2D r2d;

  void Update()
 {
     // Get the rigidbody component
     r2d = GetComponent<Rigidbody2D>;
3

Thank you.
I took your advice, but now is next errors:

Assets/Controller.cs(11,21): error CS0428: Cannot convert method group GetComponent' to non-delegate type UnityEngine.Rigidbody2D’. Consider using parentheses to invoke the method
Assets/Controller.cs(15,16): error CS1612: Cannot modify a value type return value of UnityEngine.Rigidbody2D.velocity'. Consider storing the value in a temporary variable Assets/Controller.cs(17,17): error CS1612: Cannot modify a value type return value of UnityEngine.Rigidbody2D.velocity’. Consider storing the value in a temporary variable
Assets/Controller.cs(19,17): error CS1612: Cannot modify a value type return value of `UnityEngine.Rigidbody2D.velocity’. Consider storing the value in a temporary variable

Code now:
using UnityEngine;
using System.Collections;

public class Controller : MonoBehaviour
{

    void Update()
    {
        // Get the rigidbody component

        Rigidbody2D r2d = GetComponent<Rigidbody2D>;

        // Move the spaceship when an arrow key is pressed
        if (Input.GetKey("right"))
           r2d.velocity.x = 10;
        else if (Input.GetKey("left"))
            r2d.velocity.x = -10;
        else
            r2d.velocity.x = 0;
    }
}