C# Print numbers from 1 to 15 using while loop

Program:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Loop1
{
 class Program
 {
 static void Main(string[] args)
 {
 int a;
 a = 1;
 while(a<=15)
 {
 Console.WriteLine(a);
 a++;
 }
 //wait to hit any key to exit the program
 Console.ReadKey(); 
 }
 }
}

Output

1
2
3
4
5
6
7
8
9
10 
11 
12 
13 
14 
15