// 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