var r : Ray;
print( r.GetPoint (10) ); // a point 10 units along the ray

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Ray r;
    void Example() {
        print(r.GetPoint(10));
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public r as Ray

    def Example():
        print(r.GetPoint(10))