var rect = Rect (10, 10, 100, 100);
print(rect.x);
rect.x = 20;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public Rect rect = new Rect(10, 10, 100, 100);
void Awake() {
print(rect.x);
rect.x = 20;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public rect as Rect = Rect(10, 10, 100, 100)

def Awake():
print(rect.x)
rect.x = 20