void Start() {

  StartCoroutine("func"); // Start coroutine named "func"

}

​

IEnumerator func() {

  Debug.Log("Hello");

  yield return new WaitForSecondsRealtime(1); //Wait 1 second

  Debug.Log("World");

}

using UnityEngine;

using System.Collections;// In this example we show how to invoke a coroutine and execute

// the function in parallel.  Start does not need IEnumerator.public class ExampleClass : MonoBehaviour

{

    private IEnumerator coroutine;    void Start()

    {

        // - After 0 seconds, prints "Starting 0.0 seconds"

        // - After 0 seconds, prints "Coroutine started"

        // - After 2 seconds, prints "Coroutine ended: 2.0 seconds"

        print("Starting " + Time.time + " seconds");        // Start function WaitAndPrint as a coroutine.        coroutine = WaitAndPrint(2.0f);

        StartCoroutine(coroutine);        print("Coroutine started");

    }    private IEnumerator WaitAndPrint(float waitTime)

    {

        yield return new WaitForSeconds(waitTime);

        print("Coroutine ended: " + Time.time + " seconds");

    }

}

​

using UnityEngine;

using System.Collections;

​

public class ExampleScript : MonoBehaviour

{

    private IEnumerator Start()

    {

        Debug.Log("Coroutine started.");

        yield return new WaitForSeconds(2f);

        Debug.Log("Coroutine finished.");

    }

}