using System;

​

​

​

     void PrintTriangleNested(int n)

    {

        int i = 1;

        while (i <= n)

        {

            int j = 1;

            while (j <= i) 

            {

                Console.Write("* ");

                j++;

            }

            Console.WriteLine(); 

            i++;

        }

    }

​

        Console.Write("Enter a positive integer: ");

        int n = int.Parse(Console.ReadLine());

        PrintTriangleNested(n);

​

​