Python: What is range() function in Python and how to use it? A Guide for Beginners

Publié le: 28 février 2026
sur la chaîne: ViSIT

Welcome back to our channel! In this tutorial, we are exploring the highly efficient and flexible range() function in Python using the portable WinPython environment and the Spyder interface. The range() function is the primary tool for handling iterations, allowing you to generate sequences of numbers using one, two, or three arguments. It is important to note that range() is a "lazy" object, meaning it does not generate all values and store them in memory immediately. Instead, it generates numbers on the fly only when they are called, making it incredibly memory-optimized regardless of the sequence length. To see the actual values, we must use a for loop to iterate through the range object, as printing the variable directly only displays the range definition.

When utilizing the function, a single argument sets the stop value (exclusive) and defaults the start to zero. Using two arguments allows you to define a specific start and stop value, while a third argument introduces a step value to control the increment or decrement between numbers. For descending sequences, a negative step value is required. We verified the memory efficiency of this function using the sys.getsizeof() method, demonstrating that a range object holding one million values consumes the same amount of memory as a range holding ten values. Mastering the range() function is essential for efficient Python programming.

#Python, #ProgrammingTutorial, #LearnPython, #Coding, #PythonForBeginners, #SpyderIDE, #DataStructures

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