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

[Kathryn Marks]

> ===================== Homework =======================
>
> 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
>

#!/usr/bin/python

# 99bottlesofbeer.py

# Kathryn Marks
# kathryn.python at gmail.com
# Created June 25, 2011
# Last modified June 25, 2011

# A short program to print out the lyrics of that favorite bus song.
# Linux Chix python course lesson 2, homework problem 1
# Demonstrates loops, if, else, and elif
# With a unique Korean reference at the end


for i in range(99, -1, -1):
    if i==1:
        print i,"bottle of beer on the wall,",i,"bottle of beer."
        print "Take one down and pass it around,"
        print i-1,"bottles of beer on the wall."
    elif i==0:
        print "No more bottles of beer on the wall.  How about some soju?"
    else:
        print i,"bottles of beer on the wall,",i,"bottles of beer."
        print "Take one down and pass it around,"
        print i-1,"bottles of beer on the wall."

#EOF



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

You get [ ]

You're telling python to count from 0 to 10 by subtracting one.  That's
mathematically impossible.  You have to add 1 to get from 0 to 10.


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

Pretty much right on the money.


> 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
>


#!/usr/bin/python

# counting.py

# Kathryn Marks
# kathryn.python at gmail.com
# Created June 25, 2011
# Last modified June 25, 2011

# A short program to print out the words for the number 1-5.
# Linux Chix python course lesson 2, homework problem 4
# Demonstrates loops, if, else, and elif




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

#EOF

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-- 
~Kathryn