// Casts a ray using the layer mask,
// which can be modified in the inspector.

var mask : LayerMask = -1;
function Update () {
if (Physics.Raycast (transform.position, transform.forward, 100, mask.value)) {
Debug.Log("Hit something");
}
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public LayerMask mask = -1;
void Update() {
if (Physics.Raycast(transform.position, transform.forward, 100, mask.value))
Debug.Log("Hit something");

}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public mask as LayerMask = (-1)

def Update():
if Physics.Raycast(transform.position, transform.forward, 100, mask.value):
Debug.Log('Hit something')