import java.util.*;

public class chapterFour {

    public static void main(String[] args){
        for(int i = 1; i<=100; i++){
            System.out.println(i + " ");
        }
		// 或者这么写
		int i = 1;
       	while(i != 101){
           System.out.println(i);
           ++i;
       	}
       	// 或者这么写
       	int j = 1;
       	do{
           System.out.println(j);
           j++;
       	}while(j != 101);
    }
}