金一甲詹子宜學 html ,java,javascript

public class Main { /*詹子宜2022.12.26德銘財金甲*/ public static void main(String[] args) { String a = "狗吃屎,貓抓鼠,老猴愛作怪", b =""; System.out.println("原來: " + a); int c = a.lenget(); System.out.println("長度: " + c); for (int i = 0; i

public class Main { /*詹子宜recursion遞迴函數*/ public static void main(String[] args) { int x = 11; /*Java程式必須以main開始*/ for (int i = 0; i 0) { return k + sum(k - 1);} else {return 0;} } /*函數sum呼叫自己,稱遞迴*/ public static int f(int k) { if (k > 0) { return k * f(k - 1);} else {return 1;} } /* 0!=1, 7!=7*6!,......*/ }