Visual Studio Code – C# Instantiate Vector3 Problems

I’m a beginner of learning programming
Instantiate(o, new Vector3(LocateX, LocateY, 0), transform.rotation);
In this code Visual Studio 2022 keeps telling me there is an error with LocateX and LocateY…
Please help me
using Unity
error code : CS0165

FixedCode

using System.Collections;
using System.Collections.Generic;
using UnityEditor.Experimental.GraphView;
using UnityEngine;

public class OXScript : MonoBehaviour
{
    private int clickNumber;
    public GameObject o;
    public int spotNumber;

    // Start is called before the first frame update
    void Start()
    {
        clickNumber= 0;
    }

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

    public void SpawnO()
    {
        //  1,   2,  3, y = 3
        //  4,   5,  6, y = 0
        //  7,   8,  9, y = -3
        // x=-3 x=0 x=3

        float LocateX = 0;
        float LocateY = 0;
        int ix = 0;
        for(int i=1; i<10; i++)
        {
            if (clickNumber == 0 && spotNumber == i)
            {
                // y
                if(1 <= i && i <= 3 )
                {
                    LocateY = 3;
                } else if(4 <= i && i <= 6)
                {
                    LocateY = 0;
                } else if (7 <= i && i <= 9)
                {
                    LocateY = -3;
                }
                //x
                if (ix == (i - 1) % 3)
                {
                    LocateX = -3;
                } else if (ix + 1 == (i - 1) % 3)
                {
                    LocateX = 0;
                } else if (ix + 2 == (i - 1) % 3)
                {
                    LocateX = 3;
                }

                Instantiate(o, new Vector3(LocateX, LocateY, 0), transform.rotation);
                spotNumber ++;
                clickNumber ++;
            }
        }
    }
}

Problem Solved!!

I know my code is not clean at all so thank you for helping noob everyone!