Sep 18, 2015 · Use a copy of the list when iterating, use indices, or use list.extend() with a list comprehension: for i in start_list[:]: # a copy won't grow anymore. start_list.append(i ** 2) or. start_list.append(start_list[idx] ** 2) or. If you actually meant to replace the values with their squared equivalents, just generate a new list from the old:

square_list =[i**2 for i in start_list] which returns [25, 9, 1, 4, 16] or, if the list already has values. square_list.extend([i**2 for i in start_list]) which results in a list that looks like: [25, 9, 1, 4, 16] Note: you don't want to do. square_list.append([i**2 for i in start_list]) as it literally adds a list to the original list, such as:

Feb 16, 2023 · pow() function is basically from the math module provided by python. The pow() function returns the value of v to the power of n (vn). We will use this function for squaring list elements in this article. for comparison printing the original list first, then the updated list.

When starting with Python, one common task is applying a transformation to each list element, like squaring numbers. Let’s walk through several ways to do it, from beginner-level loops to ...

Oct 29, 2024 · numbers = [1,2,3,4,5] squared_num = [] for i,num in enumerate(numbers): squared_num.append(numbers[i] ** 2) print(squared_num)

For an assignment, I have to square or cube each number in a generated list and add them together. So far, I've used the list function to create a list between two values that the user inputs and attempted to square each number, but I have yet to add them together.

Python provides the .append () function built-in to help you solve it. .append () is used to add items to the end of existing lists. Interestingly, we can also use the function in for loop to populate lists programmatically. In this quick guide, we'll walk you through using .append (). What is .append ()? What Can it Do?

Aug 26, 2024 · Python offers a powerful and concise way to achieve this using list comprehensions: original_list: We start by defining our list of numbers. squared_list = [number ** 2 for number in original_list]: This is the heart of the operation, a …

The article provides a comprehensive guide to squaring numbers within a Python list, illustrating techniques from fundamental to sophisticated. It begins with the classic for loop approach, where each number in the list is iterated over and squared, then appended to a new list.

Oct 17, 2017 · In your example, you append [4,5]. That list is considered one object and in and of itself. The extend breaks apart the iterable and adds each item separately. In your final example, you give array.extend ( [ [4,5]]). The argument there is a list, that contains exactly one item which is itself a list. Take a look at this Python documentation.