# Lists ## Presentation {% embed url="" %} ## Video Lecture {% embed url="" %} ## List Functions and Operators | | | | ------------------------------------ | ------------------------------------------------------------------------------------------------------------------------ | | list\_name = \[] | Creates an empty list | | list\_name = \[1,2,3,4,5] | A list with elements 1,2,3,4,5 | | list\_name\[0] | Access the first element of the list | | list\_name\[x-1] | Access the *x* element of the list | | len(list\_name) | Returns the number of elements in list. Useful when using a for loop and the range function. | | sum(list\_name) | Computes the sum of the values in list. | | min(list\_name) | Returns the minimum value in list. | | max(list\_name) | Returns the maximum value in list. | | list\_name.pop() | Removes the last element from list. | | list\_name.pop(position) | Removes element from the list from the given position. All elements following are moved up one place. | | list\_name.insert(position, element) | Inserts the element at the given position in the list. All elements at and following the given position are moved down. | | list\_name.append(element) | Appends the element to the end of the list. | | list\_name.index(element) | Returns the position of a given element in the list. The element must be in the list. | | list\_name.remove(element) | Removes the given element from the list and moves all elements following it up one position. | | list\_name.del(position) | Removes the element from the list by the given position. | | list\_name.sort() | Sorts the elements in the list from smallest to largest. | | item in list\_name | Returns true if item is found in the list or false otherwise. | ### Loop through a list ```python friends = ["Sam", "Taylor", "Sandy"] # Pythonic Way for f in friends: print(f) # C Style for i in range(len(friends)): print(friends[i]) ``` #### --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.pythonclassroom.com/lists.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.