How to start an infinite loop that cycles between two actions?

Questions & Answers
1

Ive been trying to program a simple infinite loop in C# that forces a game object to move up until it reaches 3f, then down until it reaches -1f, then up again. I want it to repeat infinitely until I destroy the gameobject. I’ve tried a couple things like if statements and coroutines but I’m not sure if I am implementing them correctly.
Here are my attempts:

Chained functions:

void MoveUp()
	{
		transform.Translate(new Vector3 (0.0f, 0.05f, 0.0f));
		if (transform.position.y >= 3f)
		{
			print ("movedown");
			MoveDown();
		}
	}
	void MoveDown()
	{
		transform.Translate(new Vector3 (0.0f, -0.05f, 0.0f));
		if (transform.position.y <= -1f)
		{
			print ("moveup");
			MoveUp();
		}
	}

Coroutines:

void Start () 
	{
		StartCoroutine(MoveUp());
	}
	public IEnumerator MoveUp()
	{
		yield return new WaitForSeconds(1f);
		transform.Translate(new Vector3 (0.0f, 0.05f, 0.0f));
		if (transform.position.y >= 3f)
			{
				yield return StartCoroutine(MoveDown());
			}
	}
	public IEnumerator MoveDown()
	{
		yield return new WaitForSeconds(1f)
		transform.Translate(new Vector3 (0.0f, -0.05f, 0.0f));
		if (transform.position.y <= -1f)
		{
			yield return StartCoroutine(MoveUp());
		}

	}

Any help would be much appreciated!

2

Vector3.up*3 is equivalent to Vector3(0,3,0)

If the object’s only motion is up / down between +3 and -1, meaning the objects never move on x and z but you want it to stay where you put it, you can do this:

Vector3 a,b;
a=b=transform.position;
a.y =3;
b.y =-1;