Question

I have the following array:

public string reArrange(string s)
{
    char[] array = s.ToCharArray();
    int length = array.Length;
    char[] arranged = new char[length];

    for (int i = 0; i < length; i++)
    {
        int newposition = length - i;
        arranged[newposition] = array[i];
    }

    return new string(arranged);
}

But the above method raises the following error:

System.IndexOutOfRangeException: Index was outside the bounds of the array.

So what might be wrong?

Answer 1

When i is zero, you access the array at index newposition which equals length; that’s one beyond the last valid index for the array, which is 0 through length-1.

This will fix the problem:

int newposition = length - i - 1;