函数返回

# -*- coding: utf-8 -*-
# @Author: yt
# @Date:   2018-05-15 14:00:17
# @Last Modified by:   yt
# @Last Modified time: 2018-05-15 15:16:12

def add(a,b):
    print "Adding %d +%d"% (a,b)
    return a+b

def subtract(a,b):
    print "Subtracting %d - %d"%(a,b)
    return a-b

def multiply(a,b):
    print "Multiplying %d * %d"%(a,b)
    return a*b

def divide(a,b):
    print "Dividing %d / %d"%(a,b)
    return a//b

print "Let's do some math with just functions!"

age = add(30, 3)
height = subtract(70, 3)
weight = multiply(70, 2)
iq = divide(100, 2)

print "Age:%d,Height:%d,Weight:%d,IQ:%d"%(age,height,weight,iq)

# A puzzle for the extra credit, type it in anyway. 
print "Here is a puzzle." 
 
what = add(age, subtract(height, multiply(weight, divide(iq, 2)))) 
 
print "That becomes: ", what, "Can you do it by hand?" 

运行结果如下： 图1