2.编写一个方法,求整数n的阶乘,例如5的阶乘是1*2*3*4*5
package java001; import java.util.Scanner; public class java001 { public static int Factorial(int x) { int sum = 1; for (int i = 1; i <= x; i++) { sum *= i; } return sum; } public static void main(String[] args) { System.out.println("请输入一个数字:"); Scanner input = new Scanner(System.in); int i = input.nextInt(); System.out.println(i + "的阶乘是:" + Factorial(i)); } }
编写一个方法,判断该年份是平年还是闰年
package java001; import java.util.Scanner; public class java001 { public static void Text(int year) { if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) { System.out.println(year + "是闰年"); } else { System.out.println(year + "不是闰年"); } } public static void main(String[] args) { System.out.println("请输入年份:"); Scanner input = new Scanner(System.in); int n = input.nextInt(); Text(n); } }