Review knowledge: for loop.

package homework;
//输出0-100的所有数值
public class Demo_01 {
    public static void main(String[] args) {
        //for循环 for(初始化变量;判断条件;控制语句 )
        for (int i = 0; i <= 100; i++) {
            System.out.println(i);//输出语句，输出 i 的值
        }
    }
}