Spawn a number of prefabs an equal distance apart

Hello All,

I have a script that looks at an int number (set by the user) and spawns that many prefabs on a button click. So far it works pretty well, but the prefabs all spawn on top of each other.

What do I need to add to make them spawn in a horizontal line?

Here's my functioning script C#:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class SpawnMore : MonoBehaviour {
 
     public GameObject prefab;
     public int num = 1;
     public GameObject NumObj;
     private Text Numbers;
     private float distance = 0.5f;
 
     // Use this for initialization
     void Start() {
         Numbers = NumObj.GetComponent<Text>();
         Numbers.text = num.ToString();
     }
     public void Add()
     {
         if (num < 9)
         {
             num += 1;
             SetCountText();
         }
         else
         {
             return;
         }
         }
     
     public void Subtract()
     {
         if (num > 1)
         {
             num -= 1;
             SetCountText();
         }
         else { 
             return;
         }
     }
     void SetCountText()
     {
         Numbers.text = num.ToString();
     }
     public void SpawnX()
     {
         Vector3 pos = Camera.main.transform.position;
         Vector3 setRight = Camera.main.transform.right;
         Vector3 setForward = Camera.main.transform.forward;
 
         for (var i = 0; i < num; i++)
         {
             Instantiate(prefab, (pos + (setRight * distance) + setForward * 2), transform.rotation);
         }
     }
 }