package Scanner;
//while循环语句
public class While {
    public static void main(String[] args) {
        int a = 0;
        int sum = 0;
        while (a <= 5){

        sum = (sum + a);
            a++;
            System.out.println(a+"===="+sum);
    }
//计算1+2+3+4+5的和
        System.out.println(a);
    System.out.println(sum);
 }
}
输出结果：

1====0
2====1
3====3
4====6
5====10
6====15
6
15