Unity freezes when I try to click play

Questions & Answers
1

I recent edited a script from this:
public class FPSController : MonoBehaviour {

	public float Speed = 5.0f; 
	public float StaticSpeed = 5.0f; 
	//StaticSpeed MUST be equal to Speed. 
	public float SprintSpeed = 8.0f; 
	public float Sensitivity = 2.0f; 
	 

	CharacterController player; 

	public GameObject Eyes; 
	public GameObject Player; 

	private bool isSprinting = false; 
	private bool isMouseLocked = true; 

	float moveFB; 
	float moveLR; 

	float rotX; 
	float rotY; 

	void Start () {
		player = GetComponent<CharacterController> (); 
	}

	void Update () {

		if (Input.GetButtonDown ("Unlock")) {
			isMouseLocked = !isMouseLocked; 
		}

		if (isMouseLocked == true) {
			Cursor.lockState = CursorLockMode.Locked; 
			Cursor.visible = false; 
		}

		if (isMouseLocked == false) {
			Cursor.lockState = CursorLockMode.None; 
			Cursor.visible = true; 
		}
			

		moveFB = Input.GetAxis ("Vertical") * Speed; 
		moveLR = Input.GetAxis ("Horizontal") * Speed; 

		if (Input.GetButtonDown ("Sprint")) {
			isSprinting = true;
		}

		if (Input.GetButtonUp ("Sprint")) {
			isSprinting = false; 
		}

		if (isSprinting == true) {
			Speed = SprintSpeed; 
		}

		if (isSprinting == false) {
			Speed = StaticSpeed; 
		}

		rotY = Input.GetAxis ("Mouse Y") * Sensitivity; 
		rotX = Input.GetAxis ("Mouse X") * Sensitivity; 

		Vector3 Movement = new Vector3 (moveLR, 0, moveFB); 
		Player.transform.Rotate (0, rotX, 0); 
		Eyes.transform.Rotate (-rotY, 0, 0); 

		Movement = transform.rotation * Movement; 
		player.Move (Movement * Time.deltaTime); 


	}
}

To this:

public class FPSController : MonoBehaviour {

	public float Speed = 5.0f; 
	public float StaticSpeed = 5.0f; 
	//StaticSpeed MUST be equal to Speed. 
	public float SprintSpeed = 8.0f; 
	public float Sensitivity = 2.0f; 
	public float jumpVelocity = 5.0f; 
	public float Gravity = 2.0f; 

	CharacterController player; 

	public GameObject Eyes; 
	public GameObject Player; 

	private bool isSprinting = false; 
	private bool isMouseLocked = true; 

	float moveFB; 
	float moveLR; 

	float rotX; 
	float rotY; 

	void Start () {
		player = GetComponent<CharacterController> (); 
	}

	void Update () {

		if (Input.GetButtonDown ("Unlock")) {
			isMouseLocked = !isMouseLocked; 
		}


		while (player.isGrounded == true) {
			if (Input.GetButtonDown ("Jump")) {
				Jump ();  
			}
		}

		while (player.isGrounded == false) {
			transform.Translate (Vector3.down * Gravity * Time.deltaTime); 
		}

		if (isMouseLocked == true) {
			Cursor.lockState = CursorLockMode.Locked; 
			Cursor.visible = false; 
		}

		if (isMouseLocked == false) {
			Cursor.lockState = CursorLockMode.None; 
			Cursor.visible = true; 
		}
			

		moveFB = Input.GetAxis ("Vertical") * Speed; 
		moveLR = Input.GetAxis ("Horizontal") * Speed; 

		if (Input.GetButtonDown ("Sprint")) {
			isSprinting = true;
		}

		if (Input.GetButtonUp ("Sprint")) {
			isSprinting = false; 
		}

		if (isSprinting == true) {
			Speed = SprintSpeed; 
		}

		if (isSprinting == false) {
			Speed = StaticSpeed; 
		}

		rotY = Input.GetAxis ("Mouse Y") * Sensitivity; 
		rotX = Input.GetAxis ("Mouse X") * Sensitivity; 

		Vector3 Movement = new Vector3 (moveLR, 0, moveFB); 
		Player.transform.Rotate (0, rotX, 0); 
		Eyes.transform.Rotate (-rotY, 0, 0); 

		Movement = transform.rotation * Movement; 
		player.Move (Movement * Time.deltaTime); 


	}

	void Jump () {
		transform.Translate (Vector3.up * jumpVelocity * Time.deltaTime);
	}
}

And now whenever I try to play with this script, the Unity Editor goes dark like it’s going to play, but never does. Why did this happen, and how do I fix it?

2

You have two infinite while loops which are causing unity to freeze, there’s is no need for them you can change them into an if statement.

 if (player.isGrounded) {
             if (Input.GetButtonDown ("Jump")) {
                 Jump ();  
             }
         } else {
             transform.Translate (Vector3.down * Gravity * Time.deltaTime); 
         }