How can I create an array of hexagon tile types, while building hexagon grid?

I'm new to unity and the entire C# script language, so I've looked up some tutorials on hexagon grids and pathfinding, and found this one: https://www.youtube.com/watch?v=2xXLhbQnHV4&t=729s, whcih is however working with square tiles. At 12:10 in the video, you can see that he creates an array of Tile Types, creating another script with the same name, in which he creates variables that present characteristics of different tile types. I tried to use the same thing for hexes, but I got an error.

 using UnityEngine;
 using System.Collections;
 public class Map : MonoBehaviour
 {
     public GameObject hexPrefab;
     public HexType[] tileTypes;
     float[,,] hexes;
     //Size of map with hexes
     float width = 10;
     float height = 10;
     float xOffset = 1.744f;
     float zOffset = 1.522f;
     // Use this for initialization
     void Start()
     {
         hexes = new float[width, height, 0];
         for (float x = 0; x < width; x++)
         {
             for (float y = 0; y < height; y++)
             {
                 float xPos = x * xOffset;
                 // Odd row
                 if (y % 2 == 1)
                 {
                     xPos += xOffset / 2f;
                 }
                 hexes[xPos, y * zOffset, 0];
             }
         }
     }
     // Update is called once per frame
     void Update()
     {
     }
 }

But when I try to allocate the hexTiles like in the video with this code: hexes = new float[width, height, 0];, an error pops up saying: Cannot implicitly convert type 'float' to 'int'. An explicit conversion exist(are you missing a cast?).

I'm not sure what that means. If there is any way to fix this, plese tell me how. And If not, what would be another way of doing something similar like what is shown in the video?