An embedded statement cannot be a declaration or a statement with an identifier. how to solve this error?

Question

Unity

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

public class PleyerControl : MonoBehaviour {
  public float speed = 10f;
  private Rigidbody2D rb;

  void Start () {
    rb = GetComponent <Rigidbody2D> ();
  }
  
   void Update () {
    float moveX = Input.GetAxis ("Horizontal");
    rb.MovePosition (rb.position + Vector2.right * speed * moveX * Time.deltaTime);
    if (input.GetKeyDown (KeyCode.Space))
      rb AddForce = (Vector2.Up * 8000);
  }
}

Answer 1

rb AddForce = (Vector2.Up * 8000);

what is it? Right through the gap?