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35 lines
1.1 KiB
Markdown
35 lines
1.1 KiB
Markdown
---
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title: Foreach Loop
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---
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## Foreach Loop
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The `foreach` loop executes a block of code for each item in a collection. The benefit of the `foreach` loop is you need not know how many items are within the collection to iterate through it; you simply tell your `foreach` loop to loop through the collection, as long as there are items within it. It is useful for iterating through lists, arrays, datatables, IEnumerables and other list-like data structures. It can be less efficient than a very well designed `for` loop, but the difference is negligible in most cases.
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It is worth noting however, that when a `foreach` loop iterates through a data structure, each variable is read-only. Ideally, when you want to modify data in a loop, a `for` loop is the better choice.
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### Example
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```csharp
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// syntax
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foreach (element in iterable-item)
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{
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// body of foreach loop
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}
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// sample code
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List<string> Names = new List<string>{ "Jim", "Jane", "Jack" };
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foreach(string name in Names)
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{
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Console.WriteLine("We have " + name);
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}
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```
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### Output:
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```shell
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> We have Jim
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> We have Jane
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> We have Jack
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```
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