Coroutines and while loop

Question

I have been working on a object movement along a path Which i have been geting from Navmesh Unity3d I am using coroutine in which i controled it with while loop as i can show

Answer 1

while (i < 1.0f) will run forever because i is 0.0f and 0.0f is always < 1.0f and there is no place inside your while loop, where you increement i so that it will >= 1.0f. You need a way to exit that while loop. It should have looked like something below:

while (i < 1.0f){
i++ or i= Time.detaTime..... so that this loop will exist at some point.
}

Also your moving function is bad. The function below should do what you are trying to do:

bool isMoving = false;
IEnumerator MoveObject(Transform arrow, Vector3 startPos, Vector3 endPos, float time = 3)
{
    //Make sure there is only one instance of this function running
    if (isMoving)
    {
        yield break; ///exit if this is still running
    }
    isMoving = true;

    float counter = 0;
    while (counter < time)
    {
        counter += Time.deltaTime;
        arrow.position = Vector3.Lerp(startPos, endPos, counter / time);
        yield return null;
    }

    isMoving = false;
}

Also, in your AnimateArrow(NavMeshPath path) function, replace these three lines of code:

StopCoroutine("MoveObject");
StartCoroutine(MoveObject(arrow.transform, start, end, 3.0f));
yield return null;

with

yield return StartCoroutine(MoveObject(arrow.transform, start, end, 3.0f));

Doing this will wait the MoveObject function to finish before returning and running again in the while loop. You have to replace these inside if (index != path.corners.Length - 1) and else if (index == 0)