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Zero-Based Index Access to Sequence Elements in Python

Elements of an ordered sequence are reached by an integer position that starts at zero, so the first element is at index 0 and the last is at length minus one. A learner afterwards can read an element at a given index and can say which position a given index names.

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Indexing and Slicing Lists in Python

Indexing is the mechanism for accessing a single element of a sequence by its position, using a zero-based positional address enclosed in square brackets; it can be used on either side of an assignme…