C#.....IndexOutOfBoundsException

Question

Why am I Getting A INDEXOUTOFBOUNDS EXCEPTION... Please assist and tell me where i am going wrong. I am a new programmer. Here is the code;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;


namespace ArrayTextFile
{
    class Program
    {

        static void Main(string[] args)
        {
            string filename = "C:\\Users\\Kayloz\\Desktop\\Array.txt";
            System.IO.StreamWriter W;
            W = new System.IO.StreamWriter(filename);
            int i;
            string[] names = {"Anthony ","Paul ","Zlatan ","David ","Wayne ","Jose ","Marcus ","Daley","Inez ","Juan "};



            for (i = 0; i < names.Length; i++) ;
            W.Write(names[i]);
            W.Close();



    }
}

}

`for (i = 0; i < names.Length; i++) ;` - what do you think the value of `i` is after that loop? Note that you've got an empty loop body there... I suspect you didn't mean that. Also note that if you'd declared `i` in the `for` loop, e.g. `for (int i = 0; i < names.Length; i++)` you'd have received a compile-time error instead, as `i` wouldn't have been in scope in the next line. Finally, I'd encourage you to use `foreach` anyway. — Jon Skeet, Nov 16 '16 at 14:04
`W.Write(names[i]);` is not included in your `for` loop, remove the `;` behind your loop and it should work. — Rabban, Nov 16 '16 at 14:05
I actually wrote a reasonable explanation but took too long xD — Alfie Goodacre, Nov 16 '16 at 14:07

fubo · Answer 1 · 2016-11-16T14:10:19.230

2

Remove that ; at for (i = 0; i < names.Length; i++) ;

Otherwise W.Write(names[i]); doesn't iterate. Currently you just iterate your empty statement ;

Remark: Since you don't need i outside your loop, you should declare it inside

for (int i = 0; i < names.Length; i++)

edited Nov 16 '16 at 14:10

answered Nov 16 '16 at 14:05

fubo

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score 0 · Answer 2 · answered Nov 16 '16 at 14:05

0

for (i = 0; i < names.Length; i++) {
    W.Write(names[i]);
}

W.Close();

answered Nov 16 '16 at 14:05

lubilis

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Thanks Guys... I removed the ; – ryan Nov 16 '16 at 14:12

C#.....IndexOutOfBoundsException

2 Answers2