DAY 05 - 函式

tags: python教學,函式,副程式

定義函式結構

def HW():
    print("Hello World function")

此時只有定義，運行他不會動

HW()
#輸出結果：Hello World function

傳入引數

def HW(name):
    print("Hello World", name)

HW("julian")
#輸出結果：Hello World julian

練習：印出下列句子

「''」內的字請使用者輸入
I have a 'dog' and its name is 'tony'
I have a 'cat' and its name is 'candy'

返回值

輸入 台中市
輸入 清水區
輸入 436

輸出 台中市 清水區 436

def get_location(city, area, zipcode):
    location = city + ' ' + area + ' ' + zipcode
    return location

傳入串列

def call_student(names):
    for name in names:
        print("Hi, "+name)

student = ["alan" , "jack" , "rose" , "bonny", "stan"]
call_student(student)

傳入任意數量的引數到函式

names參數中的星號()會讓python建立一個名字為names的空多元組

def call_num_student(*names):
    for name in names:
        print("Hi, "+name)
        
call_num_student("alan" , "jack" , "rose" , "bonny", "stan", "julian")

練習 - 自製平方函式 sqr(x)

解答

def sqr(num):
    return num*num

練習 - 最大公因數 gdc(x,y)

提示：while(x%y != 0)

解答

def gcd(x,y):
    tmp = 0
    while(x%y != 0):
        tmp = y
        y = x%y
        x = tmp

    return y

HomeWork - 費氏數列(斐波那契数)

0,1,1,2,3,5,8,13,21,34,55,…

解答

7/22