The for loop will iterate through all the key-value pairs in the dictionary and will print them to the screen as shown below: 4. To loop through a dictionary with the for loop, you can use the following Python code: student = Looping Through a Dictionary with a Python For LoopĪ dictionary in Python is an unordered collection of data stored as a key and a value. The for loop will go through all the elements of the tuple and print them to the screen as shown in the image below: 3. To look through a tuple with the for loop, you can use the following Python code: colors = ('red', 'green', 'blue') This means that, once a tuple is created, you cannot change its content. Looping Through a Tuple with a Python For LoopĪ tuple in Python is a collection of objects that are ordered and immutable. This code will print all the fruits in the list of fruits as shown below: 2. To loop through a list with a for loop, you can use the following code: fruits = In Python, a list is a type of data structure that can hold an ordered collection of items, which means you can store all sorts of objects - integers, floats, strings, and even other lists or complex objects. Looping Through a List with a Python For Loop

In this case, the string is the iterable, and each character (‘h’, ‘e’, ‘l’, ‘l’, ‘o’) is an element of the iterable.īelow, you will find some examples of using for loops with different iterables. Similarly, if you have a string such as ‘hello’, you can iterate over each character in the string. Each number is an element of the iterable list. This means you can pass through the iterable object using a method like a loop.Ĭommon examples of iterable objects that you’ll encounter include lists, strings, tuples, and dictionaries.įor example, when you create a list of numbers like, you can iterate over each number in the list. In Python, an iterable is any object capable of returning its elements one at a time. Python Iterables and Iterable ObjectsĪnother crucial concept to understand when working with loops is the concept of iterables and iterable objects. The code inside the loop is print(city), which prints each city in the list. In the above example, ‘city’ is the variable, and ‘cities’ is the iterable. The below example shows a basic for loop in Python: cities = The code inside the loop, denoted here as ‘# code to execute for each item’, is the action you want to perform for each item in the iterable. ‘Iterable’ is the sequence or collection of items you want to iterate over. In this syntax, ‘variable’ is the name you choose for the current item in the iteration. The basic syntax of a for loop is as follows: for variable in iterable: In Python, for loops are used to iterate over iterable objects. How to Use Python For Loops for List Comprehension 3 Advanced Techniques Using Python For Loops.How to Use the Continue Statement with a Python For Loop How to Use the Break Statement with a Python For Loop How to Use Range() Function with a Python For Loop Key Functions and Statements in Python For Loops.Looping Through a String with a Python For Loop Looping Through a Dictionary with a Python For Loop Looping Through a Tuple with a Python For Loop What is the Syntax for Python For Loops?.In this article, we’ll look at the syntax for Python for loops, the terminology used when working with them, and how to use them in different scenarios. This makes your code more efficient, readable, and less prone to errors.īefore you start writing for loops, you must understand the basics. For example, if you need to print all the elements in a list, instead of writing a print statement for each item, you can just use a for loop. This can be a list, a string, a dictionary, a set, or any other iterable object in Python.īy using a for loop, you can execute a block of code for each item in the sequence. You use for loops in your code to simplify the process of iterating over a sequence or collection of elements. A Python For Loop is a special kind of loop used when you know the exact repetitions for a loop. The condition could be anything: a certain number of repetitions, a particular state of data, or even an external event. This is where loops in programming come in.Ī loop is a control structure that allows you to repeat a set of instructions until a certain condition is met.

But that would be time-consuming and not particularly efficient. Now, you could do this manually, one number at a time. It’s simple but repetitive, like counting from 1 to 100. One of the most interesting concepts in programming languages is loops.

For loop python