# isTrigger

> Specify if this collider is configured as a trigger.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.PhysicsModule

```csharp
public bool isTrigger { get; set; }
```

### Remarks

A trigger doesn't register a collision with an incoming [Rigidbody](/engine/6000.5/script-reference/unityengine/rigidbody.md). Instead, it sends OnTriggerEnter, OnTriggerExit and OnTriggerStay message when a rigidbody enters or exits the trigger volume.

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    Collider m_ObjectCollider;

    void Start()
    {
        //Fetch the GameObject's Collider (make sure they have a Collider component)
        m_ObjectCollider = GetComponent<Collider>();
        //Here the GameObject's Collider is not a trigger
        m_ObjectCollider.isTrigger = false;
        //Output whether the Collider is a trigger type Collider or not
        Debug.Log("Trigger On : " + m_ObjectCollider.isTrigger);
    }

    void OnMouseDown()
    {
        //GameObject's Collider is now a trigger Collider when the GameObject is clicked. It now acts as a trigger
        m_ObjectCollider.isTrigger = true;
        //Output to console the GameObject’s trigger state
        Debug.Log("Trigger On : " + m_ObjectCollider.isTrigger);
    }
}
```