[section:for_each for_each]

[heading Prototype]

``
template<
    class SinglePassRange,
    class UnaryFunction
    >
UnaryFunction for_each(SinglePassRange& rng, UnaryFunction fun);

template<
    class SinglePassRange,
    class UnaryFunction
    >
UnaryFunction for_each(const SinglePassRange& rng, UnaryFunction fun);    
``

[heading Description]

`for_each` traverses forward through `rng` and for each element `x` it invokes `fun(x)`.

[heading Definition]

Defined in the header file `boost/range/algorithm/for_each.hpp`

[heading Requirements]

* `SinglePassRange` is a model of the __single_pass_range__ Concept.
* `UnaryFunction` is a model of the `UnaryFunctionConcept`.
* `UnaryFunction` does not apply any non-constant operation through its argument.
* `SinglePassRange`'s value type is convertible to `UnaryFunction`'s argument type.

[heading Complexity]

Linear. Exactly `distance(rng)` applications of `UnaryFunction`.

[endsect]