C# Program to print Number Triangle

C# Programming Language Loop control in C# Language (Article) Loop control in C# Language (Program)

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Program:

using System;  
  public class PrintExample  
   {  
     public static void Main(string[] args)  
      {  
       int  i,j,k,l,n;           
       Console.Write("Enter the Range=");    
       n= int.Parse(Console.ReadLine());     
       for(i=1; i<=n; i++)      
       {          
        for(j=1; j<=n-i; j++)      
        {      
         Console.Write(" ");      
        }      
        for(k=1;k<=i;k++)      
        {      
         Console.Write(k);      
        }      
        for(l=i-1;l>=1;l--)      
        {      
        Console.Write(l);      
        }      
        Console.Write("\n");      
       }       
   }  
  }  

Output:

Enter the Range=5
     1
    121
   12321
  1234321
 123454321  

Explanation:

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