Input key is unknown?

Questions & Answers
1

I wrote a code that display a button prompt when a player enters a certain area. When the player presses that button, the scene should change.

using UnityEngine;
using System.Collections;

public class SwitchScenes : MonoBehaviour {
public GameObject prompt;

void OnTriggerEnter () 
	{
		prompt.SetActive(true);

			if (Input.GetKeyDown("Q"))
			{
				Application.LoadLevel ("4Room");
			}
	}

	void OnTriggerExit(Collider other) {

		prompt.SetActive(false);
	}
}

But Unity says that the input key is unknown, no matter what key I put there.
I’ve just started coding, so help would be very appreciated!

2

KeyCode can be a variable.

KeyCode key = KeyCode.A; //or assign anything anytime
    
if (Input.GetKeyDown( key ))