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Arrays are fundamental data structures in Python, allowing you to store and manipulate collections of elements efficiently. Understanding how to access and manipulate array elements using index syntax is crucial for working with arrays effectively. In this tutorial, we will explore Python array index syntax with detailed explanations and code examples.
In Python, an array is a collection of elements, each identified by an index or a key. The index represents the position of an element in the array, and it starts from 0 for the first element.
Positive indexing is the most common way to access array elements. The index starts at 0 for the first element, and you can use positive integers to access subsequent elements.
Negative indexing allows you to access elements from the end of the array. The last element has an index of -1, the second-to-last has an index of -2, and so on.
Slicing allows you to create a new array by extracting a portion of the original array. It involves specifying a start index, an end index, and an optional step size.
You can modify array elements by assigning new values to specific indices.
When accessing elements using indexing, it's important to ensure that the index is within the array bounds to avoid IndexError.