How do I debug this?

Please Debug
using UnityEngine;
using System.Collections;

public class GroundCheck : MonoBehaviour {

private Player player;

void Start()
{
	player = GameObject.GetComponentInParent<Player> ();
}

void OnTriggerEnter2D(Collider2D col)
{
	player.grounded = true;
}
void OnTriggerExit2D(Collider2D col)
{
	player.grounded = false;
}

}

void Update () {
if (player.grounded) {
Debug.Log (“Wohoo Player is Grounded”);
} else {
Debug.Log (“Wohoo Player is in the Air”);
}
}