function with yield WaitForSeconds doesn't run

Questions & Answers
1

Hello all,
I’m trying to use yield WaitForSeconds, but I’m not getting good results, my problem is that the routine where yield exists isn’t executed. I’m using C#

Example: (Edited from: Overview: Coroutines & Yield)

public class example : MonoBehaviour {
	void Start()
	{
		Example();
	}
	
    IEnumerator Do() {
        print("Do now");
        yield return new WaitForSeconds(2);
        print("Do 2 seconds later");
    }
    void Example() {
        Do();
        print("This is printed immediately");
    }
	
}

Example() is fully executed (that is OK) but Do() isn’t (no prints). What can I do? Thanks in advance and sorry my bad english.

2

Coroutines need to be executed differently than normal functions/methods. Make sure to call Do() using StartCoroutine()

StartCoroutine(Do());

Unity StartCoroutine() Reference

3

See this

and your code must be like this

public class example : MonoBehaviour {
    void Start()
    {
       Example();
    }
 
    IEnumerator Do() {
        print("Do now");
        yield return new WaitForSeconds(2);
        print("Do 2 seconds later");
    }
    void Example() {
        StartCoroutine(Do());
        print("This is printed immediately");
    }
 
}
4

In C# you have to explicitly use StartCoroutine. Unityscript does not normally require it.