Challenge 2: Coroutine delay

Write a coroutine that prints a delayed message with WaitForSeconds.

Using Coroutines and WaitForSeconds

In Unity, Coroutines are used to pause execution for a given time before performing an action. Inside a method returning IEnumerator, yield return new WaitForSeconds(seconds); suspends execution and resumes once the duration elapses. To run a coroutine, call StartCoroutine().

IEnumerator DelayedMessage()
{
    yield return new WaitForSeconds(2.0f);
    Debug.Log("Time elapsed!");
}

Exercise Inspect Delay Duration

Instantiate WaitForSeconds bekleme = new WaitForSeconds(saniye); and print it with Debug.Log("Beklendi: " + bekleme.seconds);.

Show example solution

using System;

public class WaitForSeconds
{
    public float seconds;
    public WaitForSeconds(float sec) { this.seconds = sec; }
}

public static class Debug
{
    public static void Log(object message) => Console.WriteLine(message);
}

public class Program
{
    public static void Main()
    {
        float saniye = 2.0f;
        WaitForSeconds bekleme = new WaitForSeconds(saniye);
        Debug.Log("Beklendi: " + bekleme.seconds);
    }
}

Exercise Step Flow Simulation

Print Debug.Log("Basladi"); followed by Debug.Log("Bitti"); in order.

Show example solution

using System;

public static class Debug
{
    public static void Log(object message) => Console.WriteLine(message);
}

public class Program
{
    public static void Main()
    {
        Debug.Log("Basladi");
        Debug.Log("Bitti");
    }
}

Test yourself

Which yield statement in Unity causes code execution within a coroutine to pause for a specified number of seconds?
- yield return null;
- yield break;
- yield return new WaitUntil();
- yield return new WaitForSeconds(saniye);
Show answer

yield return new WaitForSeconds(saniye); — When a WaitForSeconds object is returned with yield return, execution pauses for the specified seconds.

Start Coroutine

StartCoroutine(____());

Show answer

StartCoroutine(GecikmeliGorev());

Coroutine Concepts

IEnumerator

Mandatory coroutine return type
WaitForSeconds

Yield waiting for specified seconds
StartCoroutine

Call starting coroutine execution
yield return

Keyword pausing coroutine execution

Next lesson: Challenge 3: Godot signal

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