how i instantiate a object make a prefabs at runtime i dont have to save in folder any thing..

Prefabs are GameObjects, simply stored as assets.

If you want to instantiate a GameObject that exists in the scene, you have to find it (by name, by tag, by component) and then Instantiate it like you do with a Prefab reference.

 Player player = FindObjectOfType<Player>(); // finding the player by component
 GameObject player2 = (GameObject)Instantiate (player.gameObject); // instantiate a new copy

 GameObject player = GameObject.FindGameObjectWithTag ("Player"); // finding the player by tag
 GameObject player2 = (GameObject)Instantiate (player); // instantiate a new copy

 GameObject player = GameObject.Find ("Player"); // finding the player by name
 GameObject player2 = (GameObject)Instantiate (player); // instantiate a new copy

@annonymushubh You can't make prefabs at runtime. Prefabs must be stored in a folder, before runtime.

If you want to keep data (such as data about the player) while switching scenes, store it in an object, and put:

public void Awake() { DontDestroyOnLoad(this); }

Here is an example from some of my code for Immune System TD. I load a new scene for each level, but I want to keep the information about which level the player is on, after I move to the new scene.

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

public class retaindata : MonoBehaviour {

 public int LevelNum = 1;//the current level the player is playing

 public int getLevelNum()
 {
     return LevelNum;
 }
 public void increaseLevelNum()
 {
     LevelNum += 1;
 }
 public void resetLevelNum()
 {
     LevelNum = 1;//reset to level one
 }

 public void Awake()
 {
     DontDestroyOnLoad(this);
 }
     

}