用循环结构程序设计和while语句

 
public class A{
    public static void main(String[] args){
        int i=1;
        int sum=0;
        while(i++<=100){
            sum+=i;
        }
        System.out.println(sum);
    }
}

public class Test {
    public static void main(String[] args){
        int i=1;
        int sum=0;
        while(i<=100){
            sum=sum+i;
            i=i+1;
        }
        System.out.println(sum);
    }
}