unity doesn't sense more than one key press C#

Questions & Answers
1

when i open my project i can only see 1 letter in the debug log it also doesn’t show the sprite after i press x than c.

here is my code
using UnityEngine;
using System.Collections;

public class hide_show : MonoBehaviour {

// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
    if (Input.GetKeyDown("z"))
    {
        gameObject.SetActive(false);
        Debug.Log("z");
    }
    if (Input.GetKeyDown("x"))
    {
        gameObject.SetActive(false);
        Debug.Log("x");

    }
    if (Input.GetKeyDown("c"))
    {
        gameObject.SetActive(true);
        Debug.Log("c");
    }
}

}

2

Once you set the GameObject to inactive with gameObject.SetActive(false) the Update() method won’t get called any more.