WaitForSeconds
- Game Development course
- Intermediate
- Lesson 45/83
- 4 min
Learn to pause a coroutine with WaitForSeconds.
Time delay with WaitForSeconds
When a coroutine must wait for a designated time in seconds rather than frames, WaitForSeconds is utilized. Writing yield return new WaitForSeconds(2.0f); pauses execution for precisely 2 seconds.
IEnumerator ReloadWeapon() {
Debug.Log("Reloading weapon...");
yield return new WaitForSeconds(2.5f);
Debug.Log("Weapon reloaded!");
}Weapon reloads, ability cooldowns, and on-screen dialogue durations are managed through this technique.
Time.timeScale and WaitForSecondsRealtime
WaitForSeconds is scaled by the game's internal Time.timeScale; when the game is paused (timeScale = 0), countdowns freeze as well.
// Realtime delay that runs even when the game is paused
yield return new WaitForSecondsRealtime(1.0f);For pause menu UI transitions or real-world countdown timers, WaitForSecondsRealtime is preferred.
Practice Print delay duration info
Assign "2.5" to delay and "Seconds" to unit. Print Delay: 2.5 | Unit: Seconds to the console.
Starter code
using System;
class Program
{
static void Main()
{
// delay ve unit değerlerini tanımlayıp yazdır
}
}Sample solution
using System;
class Program
{
static void Main()
{
string delay = "2.5";
string unit = "Seconds";
Console.WriteLine("Delay: " + delay + " | Unit: " + unit);
}
}Expected output
Delay: 2.5 | Unit: Seconds
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Which statement is used to pause a coroutine for 3 seconds based on game time in Unity?
- System.Threading.Thread.Sleep(3000);
- yield return new WaitForSeconds(3f); Correct answer
- yield return 3;
- wait.Seconds(3);
Explanation: yield return new WaitForSeconds(3f) is the object providing a 3-second delay based on in-game time.
2 Instantiate second-based delay object
yield return new ____(1.5f);yield return new WaitForSeconds(1.5f);Explanation: The WaitForSeconds class is instantiated to perform second-based delays.
3 Time delay terms
| Term | Meaning |
|---|---|
WaitForSeconds |
Wait seconds in game time |
WaitForSecondsRealtime |
Wait seconds by real clock |
Time.timeScale = 0 |
Freeze in-game time |
Delay |
Gap between operations |