"""
small demo of modules

  PYTHON BOOT CAMP EXAMPLE; 
    created by Josh Bloom at UC Berkeley, 2012 (ucbpythonclass+bootcamp@gmail.com)
"""

def numop1(x,y,multiplier=1.0,greetings="Thank you for your inquiry."):
    """ 
Purpose: does a simple operation on two numbers. 

Input: We expect x,y are numbers 
       multiplier is also a number (a float is preferred) and is optional.  
       It defaults to 1.0. You can also specify a small greeting as a string.

Output: return x + y times the multiplier
    """
    if greetings is not None:
          print greetings
    return (x + y)*multiplier