笨方法學習Python-習題21: 函數可以返回東西

# coding=utf-8

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("DIVING %d / %d" %(a,b))
    return a / b

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

age = add(20,4)
height = subtract(84,4)
weight = multiply(90,2)
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?")

"""
Python 詞彙 return 來將變量設置爲“一個函數的值”

爲什麼 Python 會把函數或公式倒着打印出來？
其實不是倒着打印，而是自內而外打印。如果你把函數內容逐句看下去，你會發現這裏的規律。
"""