Functions


Example:
def distance(x1, y1, x2, y2):
    # Returns dist from pt (x1,y1) to pt (x2, y2)
    dx = x2 - x1
    dy = y2 - y1
    return math.sqrt(dx*dx + dy*dy)

Notes:
Parameters are passed by value
Can return multiple values
Function with no return statement returns None
Allows Default values
Allows Keyword arguments
Allows variable number of arguments