How to make Character jump once

Questions & Answers
1

I want to make my character only jump when touching the ground. My code isn’t really good, and its really simple. Please help. This is my code:

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

public class Movement : MonoBehaviour {
private bool onGround = true;
public Rigidbody rb;
public float ForwardForce = 1000f;
public float SidewaysForce = 500f;
public float Jump = 1000f;

// Update is called once per frame
void Update () {

    if(Input.GetKey("w"))
    {
        rb.AddForce(0, 0, ForwardForce * Time.deltaTime);
    }

    if(Input.GetKey("d"))
    {
        rb.AddForce(SidewaysForce * Time.deltaTime, 0, 0);
    }

    if(Input.GetKey("a"))
    {
        rb.AddForce(-SidewaysForce * Time.deltaTime, 0, 0);
    }
	
    if(Input.GetKey("s"))
    {
        rb.AddForce(0, 0, ForwardForce * Time.deltaTime);
    }

    if(Input.GetKey("space"))
    {
        rb.AddForce(0, Jump * Time.deltaTime, 0);
    }

}

}

2

try

rb.AddForce(new Vector3(0,Jump,0));

of course if grounded is true.

3

@Kaymanga_

It doesn’t change anything, But thanks for trying.