MonoBehaviour.Awake() in Unity 5.5

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from: https://docs.unity3d.com/ScriptReference/MonoBehaviour.Awake.html

Awake  is called when the script instance is being loaded.

  • Awake  is used to initialize any variables or game state before the game starts.
  • Awake  is called only once during the lifetime of the script instance.
  • Awake  is called after all objects are initialized so you can safely  speak to other objects or query them using eg. GameObject.FindWithTag .
  • Each GameObject ‘s Awake  is called in a random order between objects.
  • Awake  is always called before any Start  functions.
  • Use Awake  instead of the constructor for initialization, as the serialized state of the component is undefined at construction time.
  • Awake  cannot be a co-routine.
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    private GameObject target;
    void Awake() {
        target= GameObject.FindWithTag("Player");
    }
}