45 lines
1.2 KiB
Markdown
45 lines
1.2 KiB
Markdown
---
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title: For Loop
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---
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# For Loop
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The `for` loop executes a block of code until a specified condition is false. Although a `for` loop looks like a <a href='https://guide.freecodecamp.org/csharp/while-loop' target='_blank' rel='nofollow'>`while` loop</a>, developers should use them __properly__. Use `while` loops when the number of iterations are variable, otherwise use `for` loops. A common use of `for` loops are array iterations.<sup>1</sup>
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## Syntax
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```C#
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for ((Initial variable); (condition); (step))
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{
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(code)
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}
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```
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The C# for loop consists of three expressions and some code.
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## Description
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- *Initial Variable*: your starting state, eg int i = 0;
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- *Condition*: While this condition is true the code will continue to run, eg i<=5;
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- *Step*: The increment, or decrement, of the initial variable, eg i++ or i-=2.
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## Example
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```C#
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int[] array = { 1, 2, 3, 4, 5 };
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for (int i = 0; i < array.Length; i++)
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{
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Console.WriteLine("Item on index {0} is {1}", i, array[i]);
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}
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```
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## Output:
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```
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> Item on index 0 is 1
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> Item on index 1 is 2
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> Item on index 2 is 3
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> Item on index 3 is 4
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> Item on index 4 is 5
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```
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### Sources
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1 https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/for
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