Dec 8, 2022 · In this article, we've briefly looked at how to declare arrays in Python, how to access values in an array, and also how to cut – or slice – a part of an array using a colon and …

So [::-1] means from 1st element to last element in steps of 1 in reverse order. If you have [start:stop] it's the same as step=1. So [:-1] it means all but last. again it's the last element …

Sep 15, 2022 · For negative indexing, to display the 1st element to last element in steps of 1 in reverse order, we use the [::-1]. The [::-1] reverses the order. In a similar way, we can slice …

Mar 20, 2013 · It means "all elements of the sequence but the last". In the context of f.readline()[:-1] it means "I'm pretty sure that line ends with a newline and I want to strip it".

Jan 20, 2013 · You'll notice it's similar to the range arguments, and the : part returns the entire iterable, so the -1 is everything except the last index. Here is some basic functionality of slicing:

May 27, 2024 · From arithmetic to bitwise operations, discover the essential Python operators and how to use them effectively with our comprehensive cheat sheet.

Jun 22, 2023 · Slicing is an important concept in Python that allows us to select specific elements from a list, tuple or string. It is done using the slicing operator [:]. The operator takes two …

Sep 8, 2024 · The double colon (::) operator in Python, also referred to as slice notation or the slicing operator, provides an elegant and flexible way to slice and extract subsequences from …

Python’s [::-1] notation is a slice that’s employed quite often, especially when it comes to reversing sequences like lists or strings. To someone new to Python, this syntax may appear somewhat …

Jul 28, 2025 · A [-1] is used for negative indexes and helps select items in reverse order in a given list. It signifies the beginning of the list from the end of the reverse order.