[Tutor] Some questions about my yen-USD.py

[Danny Yoo]

Hi Dick,

I'm looking at the last part of the main() function:

#################
def main():
     while True:
         ...
         again()
         if again:
             break
#################

This looks a little suspicious.  What does the again() function do, and is 
it supposed to return a value?