Super Mario 2d jump Code

 using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class PlayerMovent : MonoBehaviour

{

   private Rigidbody2D rb;

    //public float speed = 10f;

    // Start is called before the first frame update

   private  void Start()

    {

        rb = GetComponent<Rigidbody2D>();

    }

    // Update is called once per frame

   private void Update()

    {

        float dirX = Input.GetAxisRaw("Horizontal");

        rb.velocity = new Vector2(dirX * 7f,rb.velocity.y);

        if(Input.GetButtonDown("Jump"))

        {

            rb.velocity = new Vector2(rb.velocity.x, 14f);

        }

    }

}