#a few simple programs to illustrate the use
#of the if statement and its relatives
#These will be progressively more complex
#systems for computing income tax.

#In this simple version, the tax is simply 15% of
#the income over $20,000.  However, we show how
#to do this using the if..else construct, instead 
#of initializing the tax to 0.
def tax2():
  income = input("Enter income")
  if income>20000:
    tax=0.15*(income-20000)
  else:
    tax = 0
  #we print the amount of tax as a whole dollar value
  print "Your tax is $",int(round(tax))