41 lines
907 B
Markdown
41 lines
907 B
Markdown
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---
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title: Do while loop
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---
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# Do while Loop
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The `do while` loop executes a block of code once and until a condition is false. They are a particular case of <a href='https://guide.freecodecamp.org/csharp/while-loop' target='_blank' rel='nofollow'>`while` loops</a>: they execute a block of code one time and then until the condition is false. A common use of `do while` loops are input checks.
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## Example
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```
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do
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{
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//execute code block
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} while(boolean expression);
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string input = "";
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do
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{
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Console.WriteLine("Type A to continue: ");
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input = Console.ReadLine();
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} while(input != "A");
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Console.WriteLine("Bye!");
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```
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## Output:
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```
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> Type A to continue: b
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> Type A to continue: g
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> Type A to continue: A
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> Bye!
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```
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#### More Information:
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* [Microsoft C# - do](https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/do)
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* [Dot Net Perls - do](https://www.dotnetperls.com/do)
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