pyramidnos, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            int n=5;
            int pyramidchar = 1;
            int numtoprint=1;
            char spaceChar = '*';
            
            for(int row=1;row <=n;row++)
            {
                int space = (2*n-1-pyramidchar)/2;
                for(int col=1;col<=space;col++)
                {
                    Console.Write(spaceChar);
                }
                
                int k = 1;
                bool printNumber = true;
                while(k <= pyramidchar)
                {
                    if(printNumber)
                    {
                        Console.Write(numtoprint);
                        numtoprint++;
                    }
                    else
                    {
                        Console.Write(spaceChar);
                    }
                    
                    printNumber = !printNumber;
                    k++;
                }
                
                for(int col=1;col<=space ;col++)
                {
                    Console.Write(spaceChar);
                }
                
                pyramidchar = pyramidchar+2;
                Console.WriteLine();
            }
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,09 sec, cpu time: 0,08 sec, average memory usage: 13 Mb, average nr of threads: 3