LPTHW Exercises 27 - 31

1. Known Python data types?
2. What are functions?  How do we define and call them?
3. What is scope?  Local?  Global?

bool() --> convert a data type into a Bolean value
True -->  Boolean data type.  On switch (declares something is truth)

False -->  Boolean data type.  Off switch (declares something is false)

and  -->  Operator.  Produces True if ALL operands are true, else False
or -->  Operator.  Produces True if ANY operands are true, else False

not -->  Operator.  Produces inverse Boolean (not True == False)

== -->  Operator.  Does equal (5 ==3)!= -->  Operator.  Does not equal (5 !=3)

>= -->  Operator.  Greater than OR equal to (4 >=3)

<= -->  Operator.  Less than OR equal to (2 <=3)

not (1 == 1 and 0 != 1)
not (10 == 1 or 1000 == 1000)

not ("testing" == "testing" and "Zed" == "Cool Guy")

1 == 1 and not ("testing" == 1 or 1 == 0)

"chunky" == "bacon" and not (3 == 4 or 3 == 3)

3 == 3 and not ("testing" == "testing" or "Python" == "Fun")  

people = 20
cats = 30
dogs = 15


if people < cats:
    print "Too many cats! The world is doomed!"

if people > cats:
    print "Not many cats! The world is saved!"

if people < dogs:
    print "The world is drooled on!"

if people > dogs:
    print "The world is dry!"


dogs += 5

if people >= dogs:
    print "People are greater than or equal to dogs."

if people <= dogs:
    print "People are less than or equal to dogs."


if people == dogs:
    print "People are dogs."

people = 30
cars = 40
buses = 15


if cars > people:
    print "We should take the cars."
elif cars < people:
    print "We should not take the cars."
else:
    print "We can't decide."

if buses > cars:
    print "That's too many buses."
elif buses < cars:
    print "Maybe we could take the buses."
else:
    print "We still can't decide."

if people > buses:
    print "Alright, let's just take the buses."
else:
    print "Fine, let's stay home then."