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.

Dec 10, 2024 · Python For Loops are used for iterating over a sequence like lists, tuples, strings, and ranges. For loop allows you to apply the same operation to every item within loop. Using For Loop avoid the need of manually managing the index.

With the for loop we can execute a set of statements, once for each item in a list, tuple, set etc. Print each fruit in a fruit list: The for loop does not require an indexing variable to set beforehand. Even strings are iterable objects, they contain a sequence of characters: Loop through the letters in the word "banana":

Mar 8, 2025 · Let us learn how to use for loops in Python for sequential traversals with examples. Explanation: This code prints the numbers from 0 to 3 (inclusive) using a for loop that iterates over a range from 0 to n-1 (where n = 4). We can use for loop to iterate lists, tuples, strings and dictionaries in Python.

Mar 10, 2025 · What Are for Loops? In most data science tasks, Python for loops let you "loop through" an iterable object (such as a list, tuple, or set), processing one item at a time. During each iteration (i.e., each pass of the loop), Python updates an iteration variable to represent the current item, which you can then use within the loop's code block ...

Sep 18, 2023 · Python for Loops. The Python for loop is used when you have a block of code you want to execute a fixed number of times. To execute a for loop, you need to start with an iterable, e.g. a list or an array. Then simply loop through the contents of the iterable.

Jan 30, 2025 · Python's for loops are a powerful tool for automating repetitive tasks, making your code more efficient and easier to manage. This tutorial will explain how for loops work, explore different use cases, and provide many practical examples.

In Python, we use a for loop to iterate over sequences such as lists, strings, dictionaries, etc. For example, # access elements of the list one by one for lang in languages: print(lang) Output. In the above example, we have created a list named languages. Since the list has three elements, the loop iterates 3 times. The value of lang is.

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.

Dec 29, 2019 · In this article, we will take a deeper dive into Pythonic for-loop and witness the reason behind this dissimilarity. Let’s begin by familiarizing ourselves with the looping gotchas: