Mathf.Clamp01

static function Clamp01 (value : float) : float

Description

Clamps value between 0 and 1 and returns value.

JavaScript
    // Set the position of the transform to be that of the time
// but never less than 0 or more than 1
function Update () {
transform.position = Vector3(Mathf.Clamp01(Time.time), 0, 0);
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
void Update() {
transform.position = new Vector3(Mathf.Clamp01(Time.time), 0, 0);
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Update():
transform.position = Vector3(Mathf.Clamp01(Time.time), 0, 0)