Make a countdown timer say "go" once it reaches 0

Questions & Answers
1

I know this is a simple question, and probably has a simple answer, but I want my timer to go: “3” “2” “1” “GO!” and it only goes: “3” “2” “1” “GO!” “0” “-1” and so on.
public class countDownTimer : MonoBehaviour { public int timeLeft = 60; //Seconds Overall public Text countdown; //UI Text Object void Start () { StartCoroutine("LoseTime"); Time.timeScale = 1; //Just making sure that the timeScale is right } void Update () { countdown.text = ("" + timeLeft); //Showing the Score on the Canvas } //Simple Coroutine IEnumerator LoseTime() { for (int i = 3; i >=0; i--) { yield return new WaitForSeconds (1); timeLeft--; i++; if (timeLeft == 0) { countdown.text = ("go"); // i = 0; }}}}
Where it says //i = 0 is the problem, i think. Whenever i uncomment that script piece, it completly stops the timer

2

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class countDownTimer : MonoBehaviour
{
    private float timeLeft;
    public Text countdown;

    void Start()
    {
        timeLeft = 3;
        Time.timeScale = 1; //Just making sure that the timeScale is right
    }

    void Update()
    {
        timeLeft -= Time.deltaTime;
        if (timeLeft > 0)
        {
            countdown.text = Mathf.CeilToInt(timeLeft).ToString();
        }
        else if (timeLeft < -1)
        {
            countdown.CrossFadeAlpha(0, 0.2f, true); // Hide text
            enabled = false; // Stop timer
        }
        else
        {
            countdown.text = "Go!";
        }
    }
}

If you want to keep a coroutine

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class countDownTimer : MonoBehaviour
{
    public int timeLeft = 3;
    public Text countdown;

    void Start()
    {
        StartCoroutine(Countdown(timeLeft));
        Time.timeScale = 1; //Just making sure that the timeScale is right
    }

    IEnumerator Countdown(int time)
    {
        WaitForSeconds wait = new WaitForSeconds(1);
        for(; time > 0; --time)
        {
            countdown.text = time.ToString();
            yield return wait;
        }
        countdown.text = "Go!";
        yield return wait;
        countdown.CrossFadeAlpha(0, 0.2f, true); // Hide text
    }
}