Editing Control flow (section)

=== Collection-controlled loops ===
{{main article|Foreach loop|l1=Foreach}}
Several programming languages (e.g., [[Ada (programming language)|Ada]], [[D (programming language)|D]], [[C++11]], [[Smalltalk]], [[PHP]], [[Perl]], [[Object Pascal]], [[Java (programming language)|Java]], [[C Sharp (programming language)|C#]], [[MATLAB]], [[Visual Basic]], [[Ruby (programming language)|Ruby]], [[Python (programming language)|Python]], [[JavaScript]], [[Fortran 95]] and later) have special constructs which allow implicit looping through all elements of an array, or all members of a set or collection.

    someCollection '''do''': [:eachElement |xxx].
 
    '''for''' Item '''in''' Collection '''do''' '''begin''' xxx '''end''';
 
    '''foreach''' (item; myCollection) { xxx }
 
    '''foreach''' someArray { xxx }
 
    '''foreach''' ($someArray as $k => $v) { xxx }
 
    Collection<String> coll; '''for''' (String s : coll) {}
 
    '''foreach''' ('''string''' s '''in''' myStringCollection) { xxx }
 
    someCollection | ForEach-Object { $_ }
 
    '''forall''' ( index = first:last:step... )
[[Scala (programming language)|Scala]] has [[Scala (programming language)#For-expressions|for-expressions]], which generalise collection-controlled loops, and also support other uses, such as [[asynchronous programming]]. [[Haskell]] has do-expressions and comprehensions, which together provide similar function to for-expressions in Scala.