Foundations Updated 2026-09 View as Markdown

Lists

Lists are very similar to arrays. They can contain any type of variable, and they can contain as many variables as you wish.

Lists are very similar to arrays. They can contain any type of variable, and they can contain as many variables as you wish. Lists can also be iterated over in a very simple manner. Here is an example of how to build a list.

mylist = []
mylist.append(1)
mylist.append(2)
mylist.append(3)
print(mylist[0]) # prints 1
print(mylist[1]) # prints 2
print(mylist[2]) # prints 3

# prints out 1,2,3
for x in mylist:
    print(x)

Accessing an index which does not exist generates an exception (an error).

mylist = [1,2,3]
print(mylist[10])

numbers = []
strings = []
names = ["John", "Eric", "Jessica"]

# write your code here
numbers.append(1)
numbers.append(2)
numbers.append(3)

strings.append("hello")
strings.append("world")

second_name = names[1]

# this code should write out the filled arrays and the second name in the names list (Eric).
print(numbers)
print(strings)
print("The second name on the names list is %s" % second_name)