Me again

if (integers[i] == maxval)
{
count++;
int[] oldindicies = indices;
indices = new int[count];
oldindicies.CopyTo(indices, 0);
indices[count - 1] = i;
Debug.WriteLine(string.Format("duplicate maxima found at element index {0}.", i));

i am only confused with this line: indices[count - 1] = i;
why we use [count-1]?

Thanks in advance

[count - 1] is used to access the last element of the array.
The array is created with new int[count], and thus using count as the value for the indexer would reference an element after the last one - out of bounds. The first element of the array is referenced with an indexer value 0: [0]. The last one with [numberofelements - 1].

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Thank You very much for clarifying the vagueness.Currently i am on chapter 8 and,so far, this book is very usefull for beginners like me!