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C# While Loop

C# While Loop for beginners and professionals with examples on overloading, method overriding, inheritance, aggregation, base, polymorphism, sealed, abstract, interface, namespaces, exception handling, file io, collections, multithreading, reflection etc.

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C# While Loop

In C#, while loop is used to iterate a part of the program several times. If the number of iteration is not fixed, it is recommended to use while loop than for loop.

Syntax:

while(condition){
//code to be executed
}

Flowchart:

flowchart of C# while loop

C# While Loop Example

Let's see a simple example of while loop to print table of 1.

using System;
public class WhileExample
    {
      public static void Main(string[] args)
      {
          int i=1;  
          while(i<=10) 
          {
              Console.WriteLine(i);
              i++;
          }  
     }
   }

Output:

1
2
3
4
5
6
7
8
9
10

C# Nested While Loop Example:

In C#, we can use while loop inside another while loop, it is known as nested while loop. The nested while loop is executed fully when outer loop is executed once.

Let's see a simple example of nested while loop in C# programming language.

using System;
public class WhileExample
    {
      public static void Main(string[] args)
      {
          int i=1;  
          while(i<=3) 
          {
              int j = 1;
              while (j <= 3)
              {
                  Console.WriteLine(i+" "+j);
                  j++;
              }
              i++;
          }  
     }
   }

Output:

1 1
1 2
1 3
2 1
2 2 
2 3
3 1
3 2
3 3

C# Infinitive While Loop Example:

We can also create infinite while loop by passing true as the test condition.

using System;
public class WhileExample
    {
      public static void Main(string[] args)
      {
          while(true)
          {
                  Console.WriteLine("Infinitive While Loop");
          }  
      }
    }

Output:

Infinitive While Loop 
Infinitive While Loop
Infinitive While Loop
Infinitive While Loop
Infinitive While Loop
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