using UnityEngine; using System.Collections;

public class player_controler : MonoBehaviour {

public float moveSpeed;
public float jumpHeight;

// Use this for initialization
void Start () {
}

// Update is called once per frame
void Update () {

    if(Input.GetKeyDown) (KeyCode.Space)) 
    {
        rigidbody2d.velocity = new vector2(0,jumpHeight;)
    }

}

}

using UnityEngine;
using System.Collections;

public class player_controler : MonoBehaviour {

    public float moveSpeed;
    public float jumpHeight;

    // Use this for initialization
    void Start () {
    }
    
    // Update is called once per frame
    void Update () {

        if(Input.GetKeyDown) (KeyCode.Space)) 
        {
            rigidbody2d.velocity = new vector2(0,jumpHeight;)
        } 

    }
}

This is what shows up:

Assets/scripts/player_controler.cs(16,53): error CS0201: Only assignment, call, increment, decrement, and new object expressions can be used as a statement