Let's revisit a bit from last week

for i in range(4):
    t.forward(100)
    t.left(90)

range(4) generates numbers, from 0 to 3

if you ask Python to print range(4) in IDLE, what do you get?

Notice the square brackets? They are important!

They indicate something really important in Python: a LIST

We can use range() to print sequential numbers:

for i in range(4):
    print i

Remember that range(4) prints out [0,1,2,3]?

We could code our for loop this way:

for i in [0,1,2,3]:
    print i

But why do the work when the computer is better at it?

Let's forget our turtle for a moment and let's throw a party!

We want to invite a few friends to our Saturday party but we want each invitation to be personalized

Let's make a list of our guests

guests = ["Lea", "Ben","Isabelle","Michael"]

guests will be our variable

The list starts with the square bracket

Commas separate each item of our list

Our guest names are strings, so they will need quotes

the list ends with the closing square bracket

for g in guests:
    print "Hello "+g+"! You are invited to my party!"

Let's ask them to bring some food

food=["chips","hotdogs","soft drinks","carrots"]

as long as the list of foods is the same length as the list of guests, we'll be fine

Let's go back to our turtles!

NIFTY!!!

Now we have a lot of power at our fingertips!

Let's leave traces in the sand...

Notice the new stamp() method

Getting DIZZY!!!

Let's use our new powers