Definition and Usage The range() function returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and stops before a specified number.

Mar 10, 2026 · The range () function in Python is used to generate a sequence of integers within a specified range. It is most commonly used in loops to control how many times a block of code runs.

The range parameters start, stop, and step define where the sequence begins, ends, and the interval between numbers. Ranges can go backward in Python by using a negative step value and reversed …

Built-in Functions ¶ The Python interpreter has a number of functions and types built into it that are always available. They are listed here in alphabetical order.

Python Range () function explained The range () function generates a list of numbers. This is very useful when creating new lists or when using for loops: it can be used for both. In practice you rarely define …

Jan 21, 2026 · How the Python range function actually works The range() function doesn’t create a list of numbers. It creates a range object, which is an iterable that generates numbers on demand. This …

Jan 16, 2026 · Python range () Function: A Comprehensive Guide In Python, the range() function is a built-in utility that generates sequences of integers efficiently. Whether you’re iterating over indices in …

Jun 27, 2023 · Learn how to use Python's range() function and how it works (iterability). This tutorial includes lots of code examples.

Feb 2, 2026 · Master the Python range() function with this beginner's guide covering syntax, parameters, practical examples, and common use cases for loops and sequences.

With Python's zero-based indexing, the contents of a string length 6, are at index numbers 0..5, so range(6) will produce exactly the index numbers for a string length 6, like this: