[Courses] [python] Lesson 2: Loops, if, and beer

[Don Crowder]

On 06/24/2011 03:31 PM, Akkana Peck wrote:
> Today we're going to do some real programming:~
>
> 1. Your first programming assignment!
>     Write a program for the old "bottles of beer" song. It should print
>     something like:
>     99 bottles of beer on the wall
>     98 bottles of beer on the wall
>     97 bottles of beer on the wall
>     ... all the way down to 1.
>
>     Extra credit: make it print the number twice, e.g.
>     99 bottles of beer on the wall, 99 bottles of beer
>    

for i in range(99, 0, -1) :

     if i == 1 :
         print i, "bottle of beer on the wall", i, "bottle of beer"

     else :
         print i, "bottles of beer on the wall", i, "bottles of beer"

Note:  This taught me the importance of consistent indentation because 
it didn't work the first few times I ran it and I had a tough time 
figuring out why.

> 2. What does range(0, 10, -1) give?  (Try it.)
>    

returns []

>     Any idea why?
>    

Because when you count backwards from 0 there's no return.


> 3. How was the length of this lesson? Too much, too little or just right?
>    

This lesson was WAY too short (I'm having a blast with it).  :)


> Problem 4 is optional -- it's a little harder, but give it a try,
> and if you don't get it, take a look at the answers other students
> post. But try it on your own first, if you can.
>
> 4. Write a loop using range() that prints out the first five numbers
>     as words:
>     one
>     two
>     three
>     four
>     five
>    

for i in range(1, 6) :
     if i == 1 :
         print "one"
     elif i == 2 :
         print "two"
     elif i == 3 :
         print "three"
     elif i == 4 :
         print "four"
     else :
         print "five"


Thank you, thank you, thank you!

-- 
Don Crowder
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