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  • Video Lecture
  • List Functions and Operators
  • Loop through a list

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Lists

PreviousProblemsNextLists - Numbers

Last updated 5 years ago

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Presentation

Video Lecture

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

friends = ["Sam", "Taylor", "Sandy"]
# Pythonic Way
for f in friends:
    print(f)

# C Style
for i in range(len(friends)):
    print(friends[i])