java循环作业

一、1、计算 2+4+6+8+……+100的值1

package xiaotao;

public class Zuoye {

public static void main(String[] args) {

// TODO Auto-generated method stub

int x = 2;

int sum = 0;

while(x<=100) {

sum=sum+x;

x=x+2;

}

System.out.print(sum);

}

}

二、输入十个数，并求这十个数的乘积

package xiaotao;

import java.util.Scanner;

public class Zuoye {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

System.out.print("输入10个数字，用空格隔开：");

int a = sc.nextInt();

int b = sc.nextInt();

int c = sc.nextInt();

int d = sc.nextInt();

int e = sc.nextInt();

int f = sc.nextInt();

int g = sc.nextInt();

int h = sc.nextInt();

int i = sc.nextInt();

int j = sc.nextInt();

System.out.print("十个数的积为："+(a*b*c*d*e*f*g*h*i*j));

sc.close();

}

}

三、要求按序输出 0-9 之间的整数数字，但是不能包含数字 6

package xiaotao;

public class Zuoye {

public static void main(String[] args) {

// TODO Auto-generated method stub

for(int i = 0;i <= 9;i++) {

if(i==6) {

continue;

}

System.out.println(i);

}

}

}

四、输入一个正整数 n，然后打印出1到n 中的所有素数

package xiaotao;

import java.util.Scanner;

public class Zuoye {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

System.out.print("输入一个数：");

int n = sc.nextInt();

int i,j;

for(i=1;i<(n+1);i++) {

for(j=2;j

if(i%j==0) {

break;

}

}

if(j==i) {

System.out.println(i);

}

}

}

}

五、打印九九乘法表

package xiaotao;

public class Zuoye {

public static void main(String[] args) {

// TODO Auto-generated method stub

int i,j;

for(i=1;i<=3;i++) {

for(j=1; j<=i;j++) {

System.out.println(i+"*"+j+"="+(i*j));

}

}

}

}

六、输入一个年份n，然后输出从 1949 年到 n 年中所有的闰年

package xiaotao;

import java.util.Scanner;

public class Zuoye {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

System.out.print("输入一个数：");

int n = sc.nextInt();

for(int a =1949;a<=n;a++) {

if(a%4!=0) {

continue;

}

System.out.println(a);

}

}

}