import javax.swing as swing

def input(message):
  return float(swing.JOptionPane.showInputDialog(message))
# A program for converting Fahrenheit temperatures to Centigrade.
# This program contains an unusually large number of COMMENTS like
#this:  lines that start with # and are ignored by the python interpreter,
#but are there for people to read.
def FtoC():
#
#
#All our ptograms begin this way, with the keyword def, the name
#of the 'function' we are defining, and a (possibly empty) list
#of arguments between parentheses, then a colon.
#
#
#
  ftemp=input("Enter the temperature in Fahrenheit.")
#ftemp=input("Enter the temperature in Fahrenheit.")
#Statements following the colon are indented one tab stop.
#We could have used JES's special requestNumber function for
#this as well (this is what we did in class)
#but the input function is standard python, and does the job.
#
#
  ctemp=5.0/9*(ftemp-32)
#
#This statement illustrates several things: Forcing floating-point
#division instead of integer division, precedence of operators, 
#assignment to a variable
  print "The temperature in centigrade is ",ctemp," degrees."