Editing F Sharp (programming language) (section)

===Imperative programming===
F# support for imperative programming includes
* <code>for</code> [[Control flow#Loops|loops]]
* <code>while</code> [[Control flow#Loops|loops]]
* [[array data structure|arrays]], created with the <code>[| ... |]</code> syntax
* [[Associative array|hash table]], created with the <code>dict [ ... ]</code> syntax or <code>System.Collections.Generic.Dictionary<_,_></code> type.
Values and record fields can also be labelled as <code>mutable</code>. For example:
<syntaxhighlight lang="fsharp">
// Define 'x' with initial value '1'
let mutable x = 1
// Change the value of 'x' to '3'
x <- 3
</syntaxhighlight>
Also, F# supports access to all CLI types and objects such as those defined in the <code>System.Collections.Generic</code> namespace defining imperative data structures.