How To Double JumpLearn How to do Multiple Jumps in Unity

Source Code Used in this Video

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

public class Character : MonoBehaviour {

	[HideInInspector] public bool facingRight = true;
	[HideInInspector] public float moveForce = 50f;
	[HideInInspector] public float maxSpeed = 10f;
	[HideInInspector] public float currentSpeed = 0.0f;
	[HideInInspector] public float touchRun = 0.0f;
	[HideInInspector] public float jumpSpeed = 0.0f;

	private Rigidbody2D rb2d;
	private float ScreenWidth;
	private Animator animator;

	public Transform groundCheck;
	public bool grounded = false;
	public float jumpForce = 800f;

	private bool jump = false;
	private int numofJumps = 0;
	private int maxJumps = 4;


	// Use this for initialization
	void Awake () {
		rb2d = GetComponent();
		ScreenWidth = Screen.width;
		animator = GetComponent ();
	}

	// Update is called once per frame
	void Update () {
		grounded = Physics2D.Linecast (transform.position, groundCheck.position, 1 << LayerMask.NameToLayer ("Ground"));
		animator.SetBool ("isGrounded", grounded);
		if (Input.GetButtonDown ("Jump")) {
			jump = true;
		}
		
		touchRun = 0.0f;
		//-----TOUCH CONTROLS------
		int i = 0;
		//loop over every touch found
		while (i < Input.touchCount) {
			if (Input.GetTouch (i).position.x < ScreenWidth / 4) {
				//move left
				touchRun = -1.0f;

			} else if (Input.GetTouch (i).position.x < ScreenWidth / 2) {
				//move right
				touchRun = 1.0f;
			}
			if (Input.GetTouch (i).phase == TouchPhase.Began && Input.GetTouch (i).position.x > ScreenWidth * 0.5) {
				jump = true;
			}
			++i;
		}

		//-----CONTROLLER------
		#if UNITY_EDITOR
		touchRun = Input.GetAxis("Horizontal");
		#endif

	}

	void FixedUpdate(){
		moveCharacter(touchRun);

		if (jump)
			JumpCharacter ();

		float characterSpeed = Mathf.Abs (rb2d.velocity.x);
		animator.SetFloat ("Speed", characterSpeed);
	}

	void JumpCharacter(){
		if (grounded)
			numofJumps = 0;
		if (grounded || numofJumps < maxJumps) {
			if (!grounded)
				animator.Play ("character-jump", -1, 0f);
			
			rb2d.velocity = new Vector2 (rb2d.velocity.x, 0);
			rb2d.AddForce (new Vector2 (0f, jumpForce));
			numofJumps += 1;
			grounded = false;
		}
		jump = false;
	}




	void moveCharacter(float h){
		//float modMoveForce = grounded ? moveForce : moveForce * 1; //slow down if in air
		if (h * rb2d.velocity.x < maxSpeed)
			rb2d.AddForce (Vector2.right * h * moveForce);

		if (Mathf.Abs (rb2d.velocity.x) > maxSpeed)
			rb2d.velocity = new Vector2 (Mathf.Sign (rb2d.velocity.x) * maxSpeed, rb2d.velocity.y);


		if (h > 0 && !facingRight)
			Flip ();
		else if (h < 0 && facingRight)
			Flip ();
	}
	void Flip()	{
		facingRight = !facingRight;
		Vector3 theScale = transform.localScale;
		theScale.x *= -1;
		transform.localScale = theScale;
		rb2d.velocity = new Vector2 (rb2d.velocity.x * 0.75f, rb2d.velocity.y);

	}
}