PrintTriangels - C# Fundamentals

using System;
using System.IO;

namespace _4.PrintingTriangle
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());

            for (int row = 1; row <= n; row++)
            {
                for (int col = 1; col <= row; col++)
                {
                    Console.Write($"{col} ");
                }
                Console.WriteLine();
            }

            for (int row = n - 1; row > 0; row--)
            {
                for (int col = 1; col <= row; col++)
                {
                    Console.Write($"{col} ");
                }
                Console.WriteLine();
            }

            Console.WriteLine();
        }
    }
}