What is wrong with this script? (500556)

Unity Engine
1 
using UnityEngine;
using System.Collections;
using System;
public class test : MonoBehaviour {
	
	IEnumerator Start () 
	{
		int a = 1;
		int f = 1;
		string url = "http://www.decadesband.com/uploads/2/8/0/0/2800976/song_data.csv";
		WWW www = new WWW (url);
		yield return www;
		String [,] basic = new String [2,7];
		String [] split = www.text.Split(new Char [] {',',' '});
		foreach (String s in split)
		{
			if(a<3)
			{
				basic[a,f] = s;
				f += 1;
				if(f>7)
				{
					f=1;
					a+=1;
				}
			}
		}
		Debug.Log(basic[1,5]);
	}		

	void Update () 
	{
	
	}
}

Error log i recieved
IndexOutOfRangeException: Array index is out of range.
test+c__Iterator0.MoveNext () (at Assets/test.cs:19)

2

Means you are trying to access a item in the array which does not exist for example:

GameObject[ ] gos = new GameObject[10];

we can see there should be 10 elements in the array. They start at 0 and end 9 (0 to 9 = 10), so if i did gos[10] i would get an out of range exception.

3

should be

foreach (String s in split)
{
            if(a<2) // 3 changes to 2
            {
                basic[a,f] = s;
                f += 1;

                if(f>7)
                {
                    f=1;
                    a+=1;
                }
            }
}

since array indexes start from 0