// Makes the camera follow this object by
// making it a child of this transform.

// Get the transform of the camera
var cameraTransform = Camera.main.transform;     

// make it a child of the current object
cameraTransform.parent = transform; 

// place it behind the current object
cameraTransform.localPosition = -Vector3.forward * 5;

// make it point towards the object
cameraTransform.LookAt(transform);

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Transform cameraTransform = Camera.main.transform;
    void Example() {
        cameraTransform.parent = transform;
        cameraTransform.localPosition = -Vector3.forward * 5;
        cameraTransform.LookAt(transform);
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public cameraTransform as Transform = Camera.main.transform

    def Example():
        cameraTransform.parent = transform
        cameraTransform.localPosition = ((-Vector3.forward) * 5)
        cameraTransform.LookAt(transform)

// Detaches the transform from its parent.
transform.parent = null;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Example() {
        transform.parent = null;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Example():
        transform.parent = null