Help.. Jump by Addforce , could you help me? I want my player jump by addforce

This is my “PlayerMovement” …

public class PlayerMovement : MonoBehaviour
{

 public float _gravity = 1.5f;
 public float _yVelocity = 0.0f;
 public float _moveSpeed = 25.0f;
 public float _jumpSpeed = 40.0f;
 public CharacterController _controller;

 private bool _onGround;
 Animator anim;
 
 


 // Use this for initialization
 void Start ()
 {
    
     _controller = GetComponent<CharacterController>();
     anim = GetComponent<Animator>();
   
 }
 
 // Update is called once per frame
 void FixedUpdate ()
 {
    
       
     _onGround = _controller.isGrounded ; //Gets if the controller is grounded
     Vector3 direction = new Vector3(SimpleInput.GetAxis("Horizontal"), _yVelocity, SimpleInput.GetAxis("Vertical")); //Gets the direction
     if (direction.sqrMagnitude > 1f) direction = direction.normalized; //This prevents going faster when running diagonically
     Vector3 velocity = direction * _moveSpeed; //Multiplies the movement speed
    
    

     
       }
     else
    
      

     _controller.Move(velocity * Time.deltaTime);
     Vector3 facingrotation = Vector3.Normalize(new Vector3(SimpleInput.GetAxis("Horizontal"), 0f, SimpleInput.GetAxis("Vertical")));
     if (facingrotation != Vector3.zero)         //This condition prevents from spamming "Look rotation viewing vector is zero" when not moving.
         transform.forward = facingrotation;

if (_onGround )
{
//JUMPING
if (CrossPlatformInputManager.GetButtonDown(“Jump”))
{
// Jump by AddForce script here

         }

}

You need a Rigidbody to use AddForce:


public Rigidbody rb;


void Start(){

if(!rb){

rb = GetComponent();
}

}


void FixedUpdate(){

if (_onGround ) {

//JUMPING

if (CrossPlatformInputManager.GetButtonDown(“Jump”)) {

// Jump by AddForce script here

Vector3 jumpDirection = Vector3.up * _jumpSpeed;

rb.AddForce(jumpDirection, ForceMode.Impulse);

}

}

}