def whole_program():
    instructions()
    radius = get_radius()
    circum = calc_circum(radius)
    report_answer(radius,circum)


def instructions():
    print "Welcome to the Circumference program"
    print "you will be prompted to enter a radius value (NOT diameter!)"
    print "Radius values can be any positive number"

def get_radius():
    radius = input("Enter your radius value now: ")
    return(radius)

def calc_circum(radius):
    pi = 3.1416
    c = 2 * pi * radius
    return c

def report_answer(rad,cir):
    print "a circle with radius " + str(rad) + " has a circumference of " + str(cir)

whole_program()