How to properly use Time.deltaTime in a for loop?

Questions & Answers
1

I’m trying to get this for loop to increase i by 1 every second using Time.deltaTime but whenever I test it out, it runs all the way through in an instant

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2

If you want to do something once a second, you might wanna check out Coroutines.

Here’s a reference: Unity - Manual: Coroutines

Here’s a small example:

using System.Collections;
using UnityEngine;

public class TestScript : MonoBehaviour
{
    private void Start()
    {
        StartCoroutine(DoStuff());
    }

    private IEnumerator DoStuff()
    {
        for (int i = 0; i < 5; i++)
        {
            yield return new WaitForSeconds(1f);
            Debug.Log("Hello, world!");
        }
    }
}

Also about the Time.deltaTime. It’s simply a property that contains the number of seconds that passed between current and previous frame. Update runs once per frame, so every update Time.deltaTime will have a different value. If you want to do something every X seconds using Time.deltaTime and an Update method, you can add up the value it contains every frame and use an if statement. I would however prefer using Coroutines in that situation though.

3

Use coroutines as suggested if the action will spawn more than a frame or else use something like the below, you can use timeDelta or fixedTimeDelta whatever makes more sense in your game.

public class Timer: MonoBehaviour
{

    private int count = 0;
    private float timer = 0f;
    private float waitTime = 10f;

    private void Update()
    {

       timer += Time.fixedDeltaTime; 
       Debug.Log($"{timer}");           
        if (timer >= waitTime)
        {
            count++;            
            timer -= waitTime + Time.fixedDeltaTime;
	        Debug.Log($"{waitTime} lapsed and count is {count}");
        } 
    }
}