劉天王.HTML.CSS.JavaScript.Java

w3schools練習截圖 w3schools程式碼 #劉任昌集合set{},元組tuple(), 串列或清單list[], #字典dict{key:value,鍵:值} d = {2330:"台積電",2317:"鴻海",2454:"聯發科",6505:"台塑化"} s = {"台積電", "鴻海", "聯發科","台塑化"} t = ("台積電", "鴻海", "聯發科","台塑化") list = ["台積電", "鴻海", "聯發科","台塑化"] print(type(d),type(s),type(d),type(list)) print("台灣市場價值最大三家公司集合set列出") print(s) #練習迴圈 for a in s: print(a) print("聯發科位置:" + str(t.index("聯發科"))) """整個區塊註解前後加上連續三個引號, str將數字轉成字串 才能 和其他字串相接the set list is unordered, meaning: the items will appear in a random order. # Refresh this page to see the change in the result. """ w3schools集合方法 Python has a set of built-in methods that you can use on sets. Method Description add() Adds an element to the set clear() Removes all the elements from the set copy() Returns a copy of the set differenc...

w3scholls截圖 w3scholls練習程式碼 #字典 keys:values, 劉任昌 #w3schools原來 字串:字串,改成 整數:字串 a = { #市場價值最大的五家公司 2330: "台積電", 2317: "鴻海", 2454: "聯發科", 2412: "中華電", 6505: "台塑化" } print(a) print(a[6505]) print(a.get(2330))#功能同 a[2330] print(a.keys()) #keys()方法列出key搜尋鍵 print(a.values()) #keys()方法列出values值 b = a.copy() print("列出b " + str(b)) print(b[2317]) print(b.clear()) a.update({2308: "台達電"}) print(a.values()) print("用迴圈列出字典a的所有值") for t in a: print(a[t]) 字典方法Dictionary Methods Python has a set of built-in methods that you can use on dictionaries. Method Description clear() Removes all the elements from the dictionary copy() Returns a copy of the dictionary fromkeys() Returns a dictionary with the specified keys and value get() Returns the value of the specified key items() Returns a list containing a tuple for each key value pair keys() Returns a list containing the dictionary's keys pop() ...

w3schools練習SVG w3schools練習canvas 心得 canvas帆布 教學影片 維基百科SVG 維基百科canvas

w3schools 程式碼 #劉任昌strings可以用單引雙引只要對稱 b = '狗吃屎,兔吃菜,貓抓鼠,劉任昌很帥' # 0 1 23 4 5 678 9 10,11,12, print('字串長度' + str(len(b))) #len函數 字串長度 輸出 整數 #str函數 轉成字串 這樣才能串接 print(b[-5:-2]) #練習字串格式format quantity = "精華下午茶" itemno = 5 price = "劉任昌" myorder = "我要吃 {} 吃幾個 {}，和 {} 誰一起吃" print(myorder.format(quantity, itemno, price))

b = "貓抓鼠,狗吃屎,兔吃土" # 0 1 2 3 4 5 6 7 8 9 10 # -5 -4 -3 -2 -1 print('劉任昌w3schools字串切割slicing') print('第-5至-2:'+b[-5:-2]) print('第 6至 9:'+b[6:9]) print('整個顛倒:'+b[::-1])