C# while loop

In the previous C# tutorial, we have discussed C# for loop with examples . In this lesson, we are going to learn C# while loop. The loop is a repetitively process to execute the same code.
Let's discuss C# while loop.

C# while loop -


In the C# while loop, the statement executes repetitively as long as expression is true. In the C# for loop, we define the initial value, condition and increment value but in C# while loop, we specify the condition with while keyword inside the parenthesis.

 

In simple words, A while loop executes the statement until the condition is true. The compiler checks the condition first and execute the code of the block. In C# while loop, when the condition evaluates to false, compiler exit from the loop.

Syntax of C# while loop.


while (condition) 
{ 
statements to be executed; 
}


In the above syntax, condition to be created first and execute the block of statements as long as the condition is true.

Example of C# while loop -
Let's create an example to print the year with while loop using C# programming.


using System;

namespace whileLoop{

   public class Program {
   
      public static void Main(string[] args) {
		  int i=2021; 
		  while (i>1994){
			  
          i--;
			  Console.WriteLine(i);
		  }
		 
         Console.ReadLine();
      }
   
   }
}

Output -

2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994

 

In the above example, we declared a variable with its value. We created a condition and decrement the value using -- decrement operator in C#. First of all, the compiler checks the condition first and execute the block of code.