Question about while and DoWhile loops

Unity Engine
1

Hey I have a question. In my scene whenever I do a while or doWhile loop the object teleports instantaneously. I want it to smoothly move toward the position. I though While loops iterates through each loop.

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour
{

    public GameObject pos1;
    public GameObject pos2;
    private float _distance;
    private Vector3 _direction;

    void Start ()
    {
        _direction = pos2.transform.position - pos1.transform.position;
        WhileLoop();
    }
       
    void WhileLoop()
    {
        do
        {
            pos1.transform.position += _direction * 1 * Time.deltaTime;
            _distance = Vector3.Distance(pos1.transform.position,pos2.transform.position);
        }
        while(Mathf.Abs(_distance) >= 5);
    }
}
2

What happens here is that it loops, but loops within a single frame (the start frame), so you only ever see it when the loop is over.

if you want something to move a step every frame, just use the Update() function, without the loop part.

using UnityEngine;
using System.Collections;
public class Test : MonoBehaviour
{
    public GameObject pos1;
    public GameObject pos2;
    private float _distance;
    private Vector3 _direction;
    void Start ()
    {
         _direction = pos2.transform.position - pos1.transform.position;
     }
      
    void Update()
    {
     
         if (Mathf.Abs(_distance) >= 5)
         {
              pos1.transform.position += _direction * 1 * Time.deltaTime;
            _distance = Vector3.Distance(pos1.transform.position,pos2.transform.position);
        }
       
    }
}
3

Thanks but is there a way to not use Update() method to do this? I manage to just use coroutine but is there a way to do through a regular method? Heres my updated code:

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour
{
    public bool test;
    public GameObject pos1;
    public GameObject pos2;

    void Start ()
    {
       WhileLoop();
       //StartCoroutine("WhileLoopCoroutine");
    }
       
    void WhileLoop()
    {
        while(!Mathf.Approximately(pos1.transform.position.magnitude,pos2.transform.position.magnitude))
        {
            pos1.transform.position = Vector2.Lerp(pos1.transform.position,pos2.transform.position, 3 * Time.deltaTime);
        }
    }

    IEnumerator WhileLoopCoroutine()
    {

        while(!Mathf.Approximately(pos1.transform.position.magnitude,pos2.transform.position.magnitude))
        {
            pos1.transform.position = Vector2.Lerp(pos1.transform.position,pos2.transform.position, 3 * Time.deltaTime);
            yield return null;
        }
    }
}
4

Yeah, your coroutine code should work. just use that, and it will get updated every frame.

5

Its either coroutines or Update for every frame stuff. There is no other way.

6

OK thanks for the help. Really appreciate it.