[#nlohmann-basic_json-0c-value-0b]
= xref:nlohmann.adoc[nlohmann]::xref:nlohmann/basic_json-0c.adoc[basic_json]::value
:relfileprefix: ../../
:mrdocs:

access specified object element with default value

== Synopsis

Declared in `<nlohmann/json.hpp>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class ValueType,
    class ReturnType = value_return_type<ValueType>::type>
requires !detail::is_transparent<object_comparator_t>::value
                   && detail::is_getable<basic_json_t, ReturnType>::value
                   && !std::is_same<value_t, detail::uncvref_t<ValueType>>::value
ReturnType
value(
    object_t::key_type const& key,
    ValueType&& default_value) const;
----

== Return Value

value at _key_ if found, otherwise _default_value_

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| key of the element to access
| *default_value*
| value to return if _key_ is not found
|===


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