How to create prefab instance and add it to the scene from script

Questions & Answers
1

I give up to try again after 3-4 hours and need some help.
All what i want is create an object (prefab) on scene after player press Spacebar.
So my code now:

using UnityEngine;
using System;

public class PlayerController : MonoBehaviour
{
    public GameObject missle;
    public PlayerController()
    {
        
    }
    void Update()
    {
        var x = Input.GetAxis("Horizontal") * Time.deltaTime * 150.0f;
        var z = Input.GetAxis("Vertical") * Time.deltaTime * 3.0f;

        transform.Rotate(0, x, 0);
        transform.Translate(0, 0, z);

        if (Input.anyKeyDown)
        {
            Debug.Log(Input.inputString);
            if (Input.inputString == " ") {
                missle = Instantiate(Resources.Load("Assets/Prefabs/Missle.prefab")) as GameObject;
            };
        }
    }
}

And i keep getting error “The Object you want to instantiate is null.”

My path to prefab:
124505-screenshot-6.png

2

First. If you want to load the prefab using Resources.Load() your prefab should be in a folder called “Resources” or in a subfolder (like “Resorces/Prefabs”). You can also have multiple “Resources” folders in your project.
Second, when loading asset with Resources.Load() you must specify only relative path to your asset in one of your resources folders, like Resources.Load("Prefabs/Missle");. Note that you don’t need to put any file extension at the end (no .asset).
Third, i can see you are trying to instantiate your prefab in MonoBehaviour script. You can directly reference your prefab using serialized field instead of loading it from resourced:

[SerializeField] GameObjecct prefab; // reference
...
var missle = Instantiate<GameObject>(prefab);

Fourth. If you want to do something when user press space bar:

void Update () {
	if(Input.GetKeyDown(KeyCode.Space))
    {
        var missle = Instantiate<GameObject>(prefab);
    }
}