Question pls i need help im new and im stuck with this jump script for 2 days

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class jumpBOIpls : MonoBehaviour
6. {
7.     public float jumpHeight;
8.     private bool isJumping = false;
9.     private Rigidbody2D _rigidBody2D;
10.     public string strTag;
11.  
12.     [SerializeField]
13.     KeyCode jUMP;
14.  
15.     private void Awake()
16.     {
17.         _rigidBody2D = GetComponent<Rigidbody2D>();
18.     }
19.     private void Update()
20.     {
21.         if (Input.GetKey(jUMP) && !isJumping)
22.         {
23.             _rigidBody2D.AddForce(Vector2.up * jumpHeight);
24.             isJumping = true;
25.         }
26.     }
27.  
28.     private void OnCollisionEnter2D(Collision2D collision)
29.     {
30.         if(collision.collider.tag == strTag)
31.         {
32.             isJumping = false;
33.         }
34.     }
35. }
36. // me : PLEASE JUST WORK FOR ONCE!!!  my code : no...
37.  

pls pls pls pls pls

 

try this

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class jumpBOIpls : MonoBehaviour
6. {
7.     public float jumpHeight;
8.     private bool isJumping = false;
9.     private Rigidbody2D _rigidBody2D;
10.     public string strTag;
11.  
12.     [SerializeField]
13.     KeyCode jUMP;
14.  
15.     private void Awake()
16.     {
17.         _rigidBody2D = GetComponent<Rigidbody2D>();
18.     }
19.     private void Update()
20.     {
21.         if (Input.GetKeyDown(KeyCode.Space) && !isJumping)
22.         {
23.             _rigidBody2D.AddForce(Vector2.up * jumpHeight);
24.             isJumping = true;
25.         }
26.     }
27.  
28.     private void OnCollisionEnter2D(Collision2D collision)
29.     {
30.         if(collision.collider.tag == strTag)
31.         {
32.             isJumping = false;
33.         }
34.     }
35. }
36. // me : PLEASE JUST WORK FOR ONCE!!!  my code : no...
37.  

 

wat is the difference?