while结构学习

package Structure;

public class WhileDemon1 {
public static void main(String[] args) {
//输出1~100
int i = 1;

    while(i<100){
        i++;
        System.out.println(i);
    }
}

}

package Structure;

public class WhileDemon3 {
public static void main(String[] args) {
int i =0;
int sum =0;

    while (i<=100){
        sum = sum+i;
        i=i+1;


    }
    System.out.println(sum);
}

}