侯又誠w3schools學習Java遞迴函數recursive methods
public class Main {//侯又誠w3schools遞迴函數recursion
public static void main(String[] args) {
int x =10;
for (int i=0; i < x; i++){ //使用for迴圈
System.out.print( i + "累加等於 " + sum(i) );
System.out.println("累乘等於 " + f(i) ); }
}
public static int sum ( int k) {//定義sum函數,參數k
if (k > 0) return k + sum(k - 1); //sum函數
else return 0; }
public static int f ( int k) { //定義f函數,參數k
if (k > 0) return k * f(k - 1); //f函數再呼叫f
else return 1; } //0!=1, 5!=5x4x3x2x1
}
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