I have setup a code to make a player move around and jump, but the player will not jump. Any help would be greatly appreciated.,Player wont jump 3D

Here is my code. I believe it has something to do with my void update codes or the gravity.

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerController : MonoBehaviour { public Transform playerCamera = null;

public float mouseSensitivity = 3.5f;

 public float walkSpeed = 6.0f;

 public float gravity = -13.0f;

 public Rigidbody playerRb;

 [Range(0.0f, 0.5f)] float moveSmoothTime = 0.3f;
 [Range(0.0f, 0.5f)] float mouseSmoothTime = 0.03f;

 private bool lockCursor = true; 

 float cameraPitch = 0.0f;  //will make it immediately start the game looking forward
 float velocityY = 0.0f;

 CharacterController controller = null;

 Vector2 currentDir = Vector2.zero;
 Vector2 currentDirVelocity = Vector2.zero;

 Vector2 currentMouseDelta = Vector2.zero;
 Vector2 currentMouseDeltaVelocity = Vector2.zero;

 void Start()
 {
     playerRb = GetComponent<Rigidbody>();
     playerRb.AddForce(Vector3.up * 1000000);
     
     
     controller = GetComponent<CharacterController>();

     if(lockCursor)
     {
         Cursor.lockState = CursorLockMode.Locked;
         Cursor.visible = false;
     }
 }

 // Update is called once per frame
 void Update()
 {
     UpdateMouseLook();
     UpdateMovement();

     if (controller.isGrounded && Input.GetKeyDown(KeyCode.Space))         //getkeydown will detect when we've pressed a key, not when we've let go, which getkeyup would have done. 
     {
         playerRb.AddForce(Vector3.up * 100000, ForceMode.Impulse);
     
     }


 }


  
 void UpdateMouseLook()
 {
     Vector2 targetMouseDelta = new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y"));

     currentMouseDelta = Vector2.SmoothDamp(currentMouseDelta, targetMouseDelta, ref currentMouseDeltaVelocity, mouseSmoothTime);

     cameraPitch -= currentMouseDelta.y * mouseSensitivity;

     cameraPitch = Mathf.Clamp(cameraPitch, -90.0f, 90.0f);

     playerCamera.localEulerAngles = Vector3.right * cameraPitch;

     transform.Rotate(Vector3.up * currentMouseDelta.x * mouseSensitivity);  //transform.rotate is to be able to edit the 


 }

 void UpdateMovement()
 {
     Vector2 targetDir = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
     targetDir.Normalize();  //this will make it so when you're moving diagonally, you will not move faster than non-diagonal. 

     currentDir = Vector2.SmoothDamp(currentDir, targetDir, ref currentDirVelocity, moveSmoothTime);

     if (controller.isGrounded)
         velocityY = 0.0f;

  
     velocityY += gravity * Time.deltaTime;

     Vector3 velocity = (transform.forward * currentDir.y + transform.right * currentDir.x) * walkSpeed + Vector3.up * velocityY;

     controller.Move(velocity * Time.deltaTime);  
 }

}

,My player won't jump when I click on the spacebar, can anyone help? Here is my code, thank you very much! I have a feeling its something to do with the gravity and my void update codes

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerController : MonoBehaviour { public Transform playerCamera = null;

public float mouseSensitivity = 3.5f;

 public float walkSpeed = 6.0f;

 public float gravity = -13.0f;

 public Rigidbody playerRb;

 [Range(0.0f, 0.5f)] float moveSmoothTime = 0.3f;
 [Range(0.0f, 0.5f)] float mouseSmoothTime = 0.03f;

 private bool lockCursor = true; 

 float cameraPitch = 0.0f;  //will make it immediately start the game looking forward
 float velocityY = 0.0f;

 CharacterController controller = null;

 Vector2 currentDir = Vector2.zero;
 Vector2 currentDirVelocity = Vector2.zero;

 Vector2 currentMouseDelta = Vector2.zero;
 Vector2 currentMouseDeltaVelocity = Vector2.zero;

 void Start()
 {
     playerRb = GetComponent<Rigidbody>();
     playerRb.AddForce(Vector3.up * 1000000);
     
     
     controller = GetComponent<CharacterController>();

     if(lockCursor)
     {
         Cursor.lockState = CursorLockMode.Locked;
         Cursor.visible = false;
     }
 }

 // Update is called once per frame
 void Update()
 {
     UpdateMouseLook();
     UpdateMovement();

     if (controller.isGrounded && Input.GetKeyDown(KeyCode.Space))         //getkeydown will detect when we've pressed a key, not when we've let go, which getkeyup would have done. 
     {
         playerRb.AddForce(Vector3.up * 100000, ForceMode.Impulse);
     
     }


 }


  
 void UpdateMouseLook()
 {
     Vector2 targetMouseDelta = new Vector2(Input.GetAxis("Mouse X"), Input.GetAxis("Mouse Y"));

     currentMouseDelta = Vector2.SmoothDamp(currentMouseDelta, targetMouseDelta, ref currentMouseDeltaVelocity, mouseSmoothTime);

     cameraPitch -= currentMouseDelta.y * mouseSensitivity;

     cameraPitch = Mathf.Clamp(cameraPitch, -90.0f, 90.0f);

     playerCamera.localEulerAngles = Vector3.right * cameraPitch;

     transform.Rotate(Vector3.up * currentMouseDelta.x * mouseSensitivity);  //transform.rotate is to be able to edit the 


 }

 void UpdateMovement()
 {
     Vector2 targetDir = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
     targetDir.Normalize();  //this will make it so when you're moving diagonally, you will not move faster than non-diagonal. 

     currentDir = Vector2.SmoothDamp(currentDir, targetDir, ref currentDirVelocity, moveSmoothTime);

     if (controller.isGrounded)
         velocityY = 0.0f;

  
     velocityY += gravity * Time.deltaTime;

     Vector3 velocity = (transform.forward * currentDir.y + transform.right * currentDir.x) * walkSpeed + Vector3.up * velocityY;

     controller.Move(velocity * Time.deltaTime);  
 }

}