How can you display how long it took someone to complete a level?

Questions & Answers
1

I am making a collecting objects game and I need to know how I can display how long it took someone to complete a level after they have collected all of the items. How can I do this.

2

Here is an example script (C#) (attach it to a GUI Text in the scene (Game Object > Create Other > GUI Text)):

public float timerAccuracy = 0.1f; //How frequently will the timer update? Time in seconds.
public bool timerActive = ture; //Set this to false when you want to stop the timer
public string textBeforeSeconds = "Time: "; //If you don't want the text before the timer, leave it blank.
public string textAfterSeconds = " seconds"; //If you don't want the text after the timer, leave it blank.

private float currentTime; //The actual time since timerAcive was true

IEnumerator Start () {
    currentTime = 0; //Time is set to 0 at the start
    //Set the appropriate text to the GUI Text
    guiText.text = timeBeforeSeconds + currentTime + timeAfterSeconds;
    while (true) { //Will loop, and preform much like Update()
        if (timerActive) {
            //Add (timerAccuracy) to the actual time, every (timerAccuracy) seconds
            yield return new WaitForSeconds(timerAccuracy);
            currentTime += timerAccuracy;
            guiText.text = timeBeforeSeconds + currentTime + timeAfterSeconds;
        }
        yield return null;
    }
}

If you need a JavaScript version, I will update the answer.