Why array indexes are zero based in most programming languages?

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Arrays are zero based in c and c++ as the represent the offset from the beginning of the list of the item.

These two lines have identical result in c.

anArray[3] = 4;
*(anArray +3) = 4;

The first is the standard indexer the second takes the pointer adds three to id and then dereffrences it. Which is the same as the indexer.

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