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When using loops in programming, you sometimes need to store the results of the loops. To decide or to control the flow of a program, we have branching and Looping techniques in Python. Examples: Method 1: Using the reversed() built-in function. Using for loop. Get the size of list and using random and use random access operator [] to access elements in reverse i.e. Previous: Write a Python program to construct the following pattern, using a nested for loop. List Loops. In the following program, we shall use while loop to iterate over inner lists. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. TIP: Please refer String article to understand everything about Python Strings. code. Lists and for-loops. In the following python program, we initialize a python list with integers and reverse the list. To reverse the list elements, you have to use the Python for loop and reversed() function. Instead, we get a reverse iterator which we use to cycle through the list. This method does not return any value but reverse the given object from the list. Next: Write a Python program to count the number of even and odd numbers from a series of numbers. Let us see how… Iterative solution. List type method reverse() reverses the original list; Built-in function reversed() returns a reverse iterator; Reverse with slicing Using a while loop : Similar to a for loop, we can also use while loop to iterate a list in reverse. from (size-1) to 0. ''' This is less like the for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages.. With the for loop we can execute a set of statements, once for each item in a list, tuple, set etc. Using Extended Slice. In the following example, we will use Python While Loop to iterate through all the items in given list, and print them. Some of the common ways to reverse a string are: 1. Concatenate two lists index-wise. This method directly modifies the original list. reverse() performs in-place reverse. Return Value. list1 = ["M", "na", "i", "Ke"] list2 = ["y", "me", "s", "lly"] Expected output: … In this article, we will take a look at a step-by-step tutorial to reverse a list in Python using various ways. Strengthen your foundations with the Python Programming Foundation Course and learn the basics. In this method, we neither reverse a list in-place(modify the original list… def reverse_string(str): str1 = "" … Using while loopto iterate string characters in reverse order and append them 4. List reverse() method. Python string library does’nt support the in-built “reverse()” as done by other python containers like list, hence knowing other methods to reverse string can prove to be useful.This article discusses several ways to achieve it. The zip function takes multiple lists and returns an iterable that provides a tuple of the corresponding elements of each list as we loop over it.. The syntax of the reverse () method is: list.reverse () But we can reverse the elements in a list by using the index of elements, this is technically known as ‘slicing’. Using Slicingto create a reverse copy of the string. Using the reverse() method we can reverse the contents of the list object in-place i.e., we don’t need to create a new list instead we just copy the existing elements to the original list in reverse order. All the items are enclosed within the square brackets. Luckily, Python supports and easy-to-use data structure for storing all kinds of data: the list. When it comes to working with different types of data in Python, it’s helpful to have some way to manage it. lists-in-python +1 vote. Of course, the reversing an empty list results in empty list. Exercises 2. Instead of using inbuilt function reverse() on sequences, we will use for loop to reverse a list. #initializing and creating the list aList = [True, 26, 'Pool', 'Python', 'India'] #copying original list is merely for size reversedList = aList.copy() len = len(aList) #reverse list using for loop for i in range(0,len): reversedList[i] = aList[len-i-1] #printing the lists print('Original List\n',aList) print('New Reversed List\n',reversedList) Method 3: Using the slicing technique. close, link The following example shows the usage of reverse() method. The list name, together with a non-negative integer can then be used to refer to the individual items of data. www.tutorialkart.com - ©Copyright-TutorialKart 2018, #copying original list is merely for size, Example: Reverse List with elements of Different Datatypes, Example: Reverse an Empty List using For Loop, Salesforce Visualforce Interview Questions. The original list gets updated to the new reversed list. Python For Loops. The index of each element in the list will be changed from i to len(list)-i-1. There are number of ways to perform this operation. a = [52, 85, 41, 'sum', 'str', 3 + 5j, 6.8] Loop List items using While Loop. To iterate over a sequence of elements we use for loop, and when we want to iterate a block of code repeatedly as long as the condition is true we use the while loop.. We often use a loop, and if-else statement in our program, … You can use the below-given example to learn this method as per your requirement. Method 2: Using the reverse() built-in function. Method 1: Using the reversed() built-in function. Creating a list from the string and then calling its reverse()function 6. answered Jul 2, 2019 in Python by Wajiha • 1,950 points • 153 views. In the following python program, we initialize a python list with integers and reverse the list. In this article, we will use len() function and For Loop of Python to reverse a number. 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