"Unity error CS0019 "*" vertical 3" hatası

Kod-
using UnityEngine;
using System.Collections;
public class PlayerController : MonoBehaviour
{
    CharacterController controller;
    Vector3 velocity;
    bool isGrounded;
    public Transform ground;
    public float distance = 0.3f;
    public float speed;
    public float jumpHeight;
    public float gravity;
    public LayerMask mask;
  
    private void Start()
    {
        controller = GetComponent<CharacterController>();
    }
    private void update()
    {
        #region Movement
     float horizontal = Input.GetAxis("horizontal");
     float vertical = Input.GetAxis("vertical");
     Vector3 move = transform.right * horizontal * transform.forward * vertical;
     controller.Move(move * speed * Time.deltaTime);
     #endregion
     #region Jump
     if(Input.GetKeyDown(KeyCode.Space) && isGrounded)
     {
         velocity.y += Mathf.Sqrt(jumpHeight * -3.0f * gravity);
     }
     #endregion
     #region Gravity
  
     isGrounded = Physics.CheckSphere(ground.position, distance, mask);
     if(isGrounded && velocity.y <0)
     {
        velocity.y = 0f;
     }
     velocity.y += gravity * Time.deltaTime;
     controller.Move(velocity * Time.deltaTime);
     #endregion
  
    }
}