// Set the controller step offset to 2.0
var controller : CharacterController;
controller = GetComponent(CharacterController);
controller.stepOffset = 2.0;

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
public CharacterController controller;
void Awake() {
controller = GetComponent<CharacterController>();
controller.stepOffset = 2.0F;
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

public controller as CharacterController

def Awake():
controller = GetComponent[of CharacterController]()
controller.stepOffset = 2.0F