CharacterController.SimpleMove

Description

Moves the character with speed.

Velocity along the y-axis is ignored. Speed is in meters/s. Gravity is automatically applied. Returns if the character is grounded. It is recommended that you make only one call to Move or SimpleMove per frame.

    var speed : float = 3.0;
    var rotateSpeed : float = 3.0;

    function Update () {
        var controller : CharacterController = GetComponent.<CharacterController>();

        // Rotate around y - axis
        transform.Rotate(0, Input.GetAxis ("Horizontal") * rotateSpeed, 0);

        // Move forward / backward
        var forward : Vector3 = transform.TransformDirection(Vector3.forward);
        var curSpeed : float = speed * Input.GetAxis ("Vertical");
        controller.SimpleMove(forward * curSpeed);
    }

    @script RequireComponent(CharacterController)

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(CharacterController))]
public class ExampleClass : MonoBehaviour {
    public float speed = 3.0F;
    public float rotateSpeed = 3.0F;
    void Update() {
        CharacterController controller = GetComponent<CharacterController>();
        transform.Rotate(0, Input.GetAxis("Horizontal") * rotateSpeed, 0);
        Vector3 forward = transform.TransformDirection(Vector3.forward);
        float curSpeed = speed * Input.GetAxis("Vertical");
        controller.SimpleMove(forward * curSpeed);
    }
}