Infuriating error with GetComponent

[RJoshField]

I don’t understand why I’m getting this error. I’ve typed the code exactly as it says in the glossary, and I’ve tried every suggestion for the same issues I’ve seen on StackExchange. Still, this error will not go away. The error is within MonoDevelop, and specifically referenced GetComponent or gameObject. When I write

public Rigidbody rb = gameObject.GetComponent<Rigidbody>();

The error reads:
“An object reference is required for the non-static field, method, or property ‘UnityEngine.Component.gameObject.get’”
And if I write

public Rigidbody rb = GetComponent<Rigidbody>();

It reads:
“An object reference is required for the non-static field, method, or property ‘UnityEngine.Component.GetComponent’”

Here is the whole script:

using UnityEngine;
using System.Collections;

public class RandomRotator : MonoBehaviour 
{
	public float tumble;

	public Rigidbody rb = gameObject.GetComponent<Rigidbody>();

	void start ()
	{
		rb.angularVelocity = Random.insideUnitSphere * tumble;
	}
}

Thanks for any help.

[Orami]

try:

 using UnityEngine;
 using System.Collections;
 
 public class RandomRotator : MonoBehaviour 
 {
     public float tumble;
 
     public Rigidbody rb;
 
     void Start ()
     {
         rb = gameObject.GetComponent<Rigidbody>();
         rb.angularVelocity = Random.insideUnitSphere * tumble;
     }
 }

Or you can drag the rigidbody to the variable in the script in the inspector. You can not call code from the definition area of a variable - although you can set a default value to the basic data types.

[Jessespike]

Put the GetComponent code in the Start() function. Also the ‘s’ in Start needs to be uppercase.