Having issues creating and destroying a script component in unity

Question

I am attempting to make it so you can add and remove a script from an object like a cube at the press of a button. This is what I've got so far, but it keeps throwing up an error expecting ";" & "{" on the same space [Line 24,71 after: if (Input.GetButtonDown("Button.Two")) GetComponent (Sticky))]

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Sticky2 : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
    function Update(){
         if (Input.GetButtonDown("Button.One"))
        {
        gameObject.AddComponent<Sticky>();
        }
    }

    function Update() {
         if (Input.GetButtonDown("Button.Two")) GetComponent (Sticky))
           Destroy (GetComponent (Sticky));
        }
    }

Answer 1

• function Update() ???

  This is c# not unityscript .

• Also GetComponent (Sticky) should rather be GetComponent<Sticky>()

• and what is if (Input.GetButtonDown("Button.Two")) GetComponent (Sticky)) supposed to do?

• and in general you are missing like two closing } in your code and every statement ends with a ;in c#

It should probably rather be eg

public class Sticky2 : MonoBehaviour
{
    private void Update()
    {
        // Use GetComponent in order to check if such componnet already exists
        if (Input.GetButtonDown("Button.One") && !GetComponent<Sticky>())
        {
            gameObject.AddComponent<Sticky>();
        }
    
        // Use TryGetComponent in order to check and get the component in one single go
        if (Input.GetButtonDown("Button.Two") && TryGetComponent<Sticky>(out var sticky))
        {
            Destroy(sticky);
        }
    }
}