while 循环:
public class ceshi{
public static void main(String[] args){
int i=0;
while(i++<10)
System.out.println("测试"+i);
}
}
循环求和:
public class ceshi{
public static void main(String[] args){
int i=0;
int sum=0;
while(i++<100){
sum=i+sum;
}
System.out.println("1+2+3+...+100="+sum);
}
}
求学生平均成绩:
import java.util.*;
public class ceshi{
public static void main(String[] args){
Scanner in=new Scanner(System.in);
System.out.println("请输入学生人数");
int personnum=in.nextInt();
int i=0;
int sum=0;
while(i++<personnum){
System.out.println("请输入学号为"+i+"的学生成绩:");
sum=sum+in.nextInt();
}
System.out.println("该班级学生学生平均成绩为:"+sum/personnum+"
分");
}
}