Unity Crashes when Using this UI - unity3d

Question

using UnityEngine.UI;
using UnityEngine;
public class Tutorial : MonoBehaviour
{
public Text tutorialText;
void Update()
{
tutorialText.text = "Press [SPACE] to Jump... (obviously...)";
if (Input.GetKeyDown(KeyCode.Space))
{
while (true)
{
tutorialText.text = "Now Shoot";
if (Input.GetKeyDown(KeyCode.Mouse0))
{
while (true)
{
tutorialText.text = "Nice";
}
}
}
}
}
}

Answer 1

Change your code to that, because right now you are in a infinite loop which sets your tutorialtext to "Now Shoot" again and again until Unity crashes.
if (Input.GetKeyDown(KeyCode.Space))
{
tutorialText.text = "Now Shoot";
}
else if (Input.GetKeyDown(KeyCode.Mouse0))
{
tutorialText.text = "Nice";
}
If you want the text to disappear after the first time you done the actions you should add bool variables.
bool jumped = false;
bool hasShot = false;
And then implement thoose bools into your code like this:
if (Input.GetKeyDown(KeyCode.Space))
{
if (jumped)
return;
tutorialText.text = "Now Shoot";
jumped = true;
}
else if (Input.GetKeyDown(KeyCode.Mouse0))
{
if (hasShot || !jumped)
return;
tutorialText.text = "Nice";
hasShot = true;
}
You also need to move the first text definition out of Update, because Update is called each frame. Put it into void Start() instead
void Start() {
tutorialText.text = "Press [SPACE] to Jump... (obviously...)";
}