C#第二章课后作业2

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApplication3{    class Program    {        static void Main(string[] args)        {            int i, j;            for (i = 1; i <= 5; i++)            {                for (j = 1; j <= i; j++)                {                    Console.Write(i);                }                Console.WriteLine();            }            Console.ReadLine();        }    }}