while循环

package test.operator;
public class whileDemo01 {
    public static void main(String[] args) {
        //输出1-100的数字
        int i =0;
        while(i<100){
            i++;
            System.out.println(i);
        }
    }
}

package test.operator;
public class whileDemo02 {
    public static void main(String[] args) {
        //计算1+2+3+......+99+100的和
        int i = 1;
        int sum = 0;
        while(i<=100){
            sum = sum + i;
            i++;
        }
        System.out.println("1+2+3+......+99+100 = " + sum);
    }
}