Review of Array

Python Arrays

By Steven Howard

Arrays

​So far we have only used variables to store 1 value, eg:

name = "Bob"

​

An array allows us to store multiple values in 1 variable. It is like a LIST. eg:

​

name = ["bob", "Sally", "Harry"]​

Open Ended

What is an array?

Multiple Choice

Which of these is an list?

• fruit = ['apples', 'oranges', 'bananas']

• fruit = "apples", "oranges", "bananas"

• fruit = {"apples", "oranges", "bananas"}

• fruit = ("apples", "oranges", "bananas")

Multiple Choice

What is the result of this code?

colors = ['Red' ,'Blue' ,'Yellow' ,'Red']

for i in colors:

print (i)

• ['Red', 'Blue', 'Yellow', 'Red']

• Red ,Blue ,Yellow, Red

• Red

  Blue

  Yellow

  Red

• 0 Red

  1 Blue

  2 Yellow

  3 Red

​You are already familiar with 1D arrays, which look like this:

​Names = ['Ann', 'Chloe', 'Dave', 'Eve', 'Helen', 'Jim']

​Ages = [13, 17, 15, 8, 16, 12]

​All the elements of a 1D array are on the same row/line