To loop through a set of code a specified number of times, we can use the range() function, The range() function returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and ends at a specified number.

Python’s for loop allows you to iterate over the items in a collection, such as lists, tuples, strings, and dictionaries. The for loop syntax declares a loop variable that takes each item from the collection in each iteration. This loop is ideal for repeatedly executing a block of code on each item in the collection.

All you have to do is apply the lambda function square to each element i and append the result to the empty list square_nums. You could also do something like: map () apply function to all items in an iterable, but return a map object so we transform it to a list. There are several ways to do this, including a one-liner without a for loop.

Jul 27, 2021 · What is a for loop in Python? A for loop can iterate over every item in a list or go through every single character in a string and won't stop until it has gone through every character. Writing for loops helps reduce repetitiveness in your code, following the DRY (Don't Repeat Yourself) principle.

1 day ago · # Using a for loop squares = [] for num in range(1, 6): squares.append(num ** 2) # Using list comprehension squares = [num ** 2 for num in range(1, 6)] Conclusion. The for loop is a fundamental and powerful feature in Python. By understanding its basic concepts, various usage methods, common practices, and best practices, you can write more ...

Mar 10, 2025 · To create a Python for loop, you start by defining an iteration variable and the iterable object you want to loop through. The iteration variable temporarily holds each item from the iterable during each loop. Then, inside the loop, you specify the actions you want to perform using this variable.

Sep 20, 2024 · In Python, the for loop is used to iterate over elements of a sequence (such as lists, strings, tuples, etc.). Unlike languages like C or Pascal, where for loops are used to iterate over a range of numbers, Python's for loop is more versatile, allowing you to iterate over any iterable object, such as lists, dictionaries, and strings.

Mar 4, 2025 · In Python, ‘for loops’ are the fundamental control flow statements that are generally used to execute the particular condition in the block of code repeatedly for a fixed number of iterations.

First, the function range (1, 4) is generating a list of numbers beginning at 1 and ending at 3. Check the description of the function range and get familiar with how to use it. In a very simple form, it is range (start, stop, step), and the step is optional with 1 as the default. The variable n is assigned the value 0.

Dec 28, 2022 · We use a for loop when we want to repeat a code block a fixed number of times. A for loop is a part of a control flow statement which helps you to understand the basics of Python. Why use for loop? In Python, the for loop is used to iterate over a sequence such as a list, string, tuple, other iterable objects such as range.