function Start() {
    var proj : Projector = GetComponent(Projector);
    proj.farClipPlane = 20.0;
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Start() {
        Projector proj = GetComponent<Projector>();
        proj.farClipPlane = 20.0F;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Start():
        proj as Projector = GetComponent[of Projector]()
        proj.farClipPlane = 20.0F