public class day02 {
public static void main (String []args){
method01(29,20);
method02();
}
public static void method01(int a,int b){
int sum=a*b;
System.out.println("结果是"+sum);
}
public static void method02(){
for(int i=0;i>20;i++) {
System.out.println("hello,world" + i);
}
}
}