error CS0201: Only assignment, call, increment, decrement, and new object expressions can be used as a statement

Questions & Answers
1

This is my player.cs script,

using UnityEngine;

public class Player : MonoBehaviour
{
// The force which is added when the player jumps
// This can be changed in the Inspector window
public Vector2 jumpForce = new Vector2(0, 300);

// Update is called once per frame
void Update ()
{
	// Jump
	if (Input.GetKeyUp("space"))
	{
		GetComponent<Rigidbody2D>= Vector2();
		GetComponent<Rigidbody2D>(jumpForce);
	}
	
	// Die by being off screen
	Vector2 screenPosition = Camera.main.WorldToScreenPoint(transform.position);
	if (screenPosition.y > Screen.height || screenPosition.y < 0)
	{
		Die();
	}
}

// Die by collision
void OnCollisionEnter2D(Collision2D other)
{
	Die();
}

void Die()
{
	Application.LoadLevel(Application.loadedLevel);
}

}

Please respond as soon as possible
Thanks in advance

2

You’re only getting components for lines 7 and 8. Also line 7 is not even a valid statement and line 8 you cannot have anything in the enclosing parenthesis when getting a component. Note that the GetComponent method only gets the first component with that specific instance type. Are you trying to make your character jump, or is this a post jumping function?

3

GetComponent= Vector2();
GetComponent(jumpForce);

That syntax makes no sense either in C# or in Unity API here is what it could look like :

    Rigidbody2D rigidBody2D = GetComponent<Rigidbody2D>();

    if(rigidBody2D) {
        rigidBody2D.AddForce(jumpForce);
    }

a few consideration :

  • GetComponent is a method it needs to be followed by () eventually with arguments
  • the only case i can think of where you could pass arguments to GetComponent would be the none generic form : GetComponent(typeof(Rigidbody2D)) (it only takes a type or a string as argument)
  • Vector2() is a constructor it is also a method but cannot exist without the new keyword in front of it new specifies that you want memory allocated for the instance returned by the constructor

some documentation on how o use GetComponent()