This wont work with a Character Controller.

Here is the problem. this works with a humanoid character wearing a rigid body and cap.collider but that sucks balls when it comes to getting any sort of proper gravity movement and detection.

 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 
 
 public class HealthControl : MonoBehaviour
 {
     public Image healthBar;
     public float health;
     public GameObject restartDialog;
     
 
     void Start()
     {
         ShowRestartDialog(false);
     }
     void Update()
     {
         checkHealth();
     }
     void checkHealth()
     {
         healthBar.rectTransform.localScale = new Vector3(health / 100, healthBar.rectTransform.localScale.y, healthBar.rectTransform.localScale.z);
         if (health <= 0.0f)
         {
             ShowRestartDialog(true);
         }
     }
     void OnCollisionEnter(Collision other)
     {
         if (other.collider.CompareTag("Death"))
         {
             SubtractHealth(25.0f);
         }
         else if (other.collider.CompareTag("Life"))
         {
             AddHealth(25.0f);
         }
     }
     public void SubtractHealth(float amount)
     {
         if (health - amount < 0.0f)
         {
             health = 0.0f;
         }
         else
         {
             health -= amount;
         }
     }
     public void AddHealth(float amount)
     {
         if (health + amount > 100.0f)
         {
             health = 100.0f;
         }
         else
         {
             health += amount;
         }
     }
     public void ShowRestartDialog(bool c)
     {
         if (c)
         {
             Time.timeScale = 0.0f;
         }
         else
         {
             Time.timeScale = 1.0f;
         }
         restartDialog.SetActive(c);
     }
     public void Restart()
     {
        SceneManager.LoadScene (SceneManager.GetActiveScene().buildIndex);
     }
 }

I tried this adaptation to player movement but loose not only the ability to jump, but the health script ceases to work, but i get all my other proper movement and gravity.

using UnityEngine;

 public class PlayerControl : MonoBehaviour
 {
     public Animator anim;
     public CharacterController  cc;
     public float pushPower = 2.0F;
     public float speed;
     public float inputH = 20f;
     public float inputV = 50f;
     private bool run;
     private bool jump;
     private object hit;
 
     void OnControllerColliderHit(ControllerColliderHit hit)
     {
         Rigidbody body = hit.collider.attachedRigidbody;
         if (body == null)
             return;
         if (hit.moveDirection.y < -0.3F)
             return;
 
         Vector3 pushDir = new Vector3(hit.moveDirection.x, 0, hit.moveDirection.z);
         body.velocity = pushDir * pushPower;
     }
         // Use this for initialization
         void Start()
     {
         anim = GetComponent<Animator>();
         cc = GetComponent<CharacterController>();
         cc.detectCollisions = false;
         run = false;
         jump = false;
     }
 
     // Update is called once per frame
     void Update()
     {
        
         if (Input.GetKey(KeyCode.RightControl))
         {
             run = true;
         }
         else
         {
             run = false;
         }
 
         if (Input.GetKey(KeyCode.Space))
         {
           jump = true;
         }
         else
         {
           jump = false;
         }
         {
             CharacterController controller = GetComponent<CharacterController>();
             Vector3 horizontalVelocity = controller.velocity;
             horizontalVelocity = new Vector3(controller.velocity.x, 0, controller.velocity.z);
             float horizontalSpeed = horizontalVelocity.magnitude;
             float verticalSpeed = controller.velocity.y;
             float overallSpeed = controller.velocity.magnitude;
             if ((controller.collisionFlags & CollisionFlags.Above) != 0)
                 print("WTF");
         }
 
             inputH = Input.GetAxis("Horizontal");
             inputV = Input.GetAxis("Vertical");
        
         anim.SetFloat("inputH", inputH);
         anim.SetFloat("inputV", inputV);
         anim.SetBool("run", run);
         anim.SetBool("jump", jump);
 
         float moveX = inputH * 20f * Time.deltaTime;
         float moveZ = inputV * 50f * Time.deltaTime;
 
         if (moveZ <= 0f)
         {
             moveX = 0f;
         }
         else if (run)
         {
             moveX *= 6f;
             moveZ *= 6f;
 }
    
 }
 }

so i went back to thios setup and i get my jumping and movement but of course i get stuck jumping in place but to keep my character from getting knocked off into space or falling over, you HAVE TO HAVE the rotations of x, y, and z checked, and if you uncheck Y on position, yes you can fall, but at a freaking snail pace, and it is frankly garbage.

 using UnityEngine;
 
 
 public class PlayerControl : MonoBehaviour
 {
     public Animator anim;
     public Rigidbody Rb;
 
     public float speed;
     public float inputH = 20f;
     public float inputV = 50f;
     private bool run;
     private bool jump;
     
 
     // Use this for initialization
     void Start()
     {
         anim = GetComponent<Animator>();
         Rb = GetComponent<Rigidbody>();
         run = false;
         jump = false;
     }
 
     // Update is called once per frame
     void Update()
     {
        
         if (Input.GetKey(KeyCode.RightControl))
         {
             run = true;
         }
         else
         {
             run = false;
         }
 
         if (Input.GetKey(KeyCode.Space))
         {
           jump = true;
         }
         else
         {
           jump = false;
         }
 
         inputH = Input.GetAxis("Horizontal");
         inputV = Input.GetAxis("Vertical");
 
         anim.SetFloat("inputH", inputH);
         anim.SetFloat("inputV", inputV);
         anim.SetBool("run", run);
         anim.SetBool("jump", jump);
 
         float moveX = inputH * 20f * Time.deltaTime;
         float moveZ = inputV * 50f * Time.deltaTime;
 
         if (moveZ <= 0f)
         {
             moveX = 0f;
         }
         else if (run)
         {
             moveX *= 6f;
             moveZ *= 6f;
         }
         Rb.velocity = new Vector3(moveX, 0f, moveZ * speed);
        
     }
 }

Please do not tell me "what number line" i need to put what where, because presently I am using visual studio and it isn't allowing me to use the "line number" views. If you know what line string to put in where that I am missing, simply specify copy these codes, and do the ///Here is the change/// so i can see what i was doing incorrectly.