public class Main { //劉任昌2022.12.16類別名稱Main
public static void main(String[] args)//必須存成Monkey.java
{ int r = 16; //宣告整數r=方法sum
for (int i =0; i < r; i++) { //迴圈
System.out.print(i + "累加 "+ sum(i) );
System.out.println(" 累乘機 "+ f(i) );}
}
public static int sum(int k) { //方法(函數sum)參數 k
if (k > 0) { //條件判斷
return k + sum(k - 1); //k>0, 計算 k + sum(k-1)遞迴
} else { //遞迴,類似f(f(f(x)))函數
return 0;
}
}
public static int f(int k) { //方法(函數f)參數 k
if (k > 0) { //條件判斷
return k * f(k - 1); //k>0, 計算 k * f(k-1)遞迴
} else { //遞迴,類似f(f(f(x)))函數
return 1;
}
}
}
w3schools陣列截圖 w3schools陣列程式碼 #劉任昌拷貝自 201單元 """for x in 'Takming': #迴圈逐字元印出 print("字母: %s" % x)三引號框起註解 """ fruits = ['台積電', '鴻海', '聯發科'] #台灣市場價值最高的三公司 for x in fruits: # print ("公司: %s" % x) print(fruits) fruits.append("中華電") print("使用append") print(fruits) fruits.clear() print("使用clear") print(fruits) fruits = ['台積電', '鴻海', '聯發科', '中華電'] chicken = fruits.copy() #和 chicken = fruits 有何不同? print(chicken) fruits.append("中華電") print(fruits.count("中華電")) print(fruits.count("台積電")) for x in fruits: print(x) if x == "中華電": #判斷式是否banana print('I hate 中華電.') if x == "聯發科": #判斷式是否cherry print('I like cherry.') if x == "鴻海": #判斷式是否apple print('You are my sweet apple.') #體會到只要我有耐心與興趣,我也可以當一個專業的程式開發人員 w3schools陣列方法Array Methods Pyt...
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() ...
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