beginner question (True False help)

[eschneider92 at comcast.net]

(I forgot to post this with my last post.)
Also, I don't understand any part of the following example, so there's no specific line that's confusing me. Thanks for the help btw.

var = 42 
def  myfunc(): 
     var = 90 

print "before:", var 
myfunc() 
print "after:", var 

def myfunc(): 
    global var 
    var = 90