[#base_uint-0d-2constructor-02]
= xref:base_uint-0d.adoc[base&lowbar;uint&lt;256&gt;]::base&lowbar;uint
:relfileprefix: ../
:mrdocs:

Constructors

== Synopses

Declared in `&lt;arith&lowbar;uint256&period;h&gt;`

Constructs a big integer with a value of zero&period;


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:base_uint-0d/2constructor-06.adoc[base&lowbar;uint]();
----

[.small]#xref:base_uint-0d/2constructor-06.adoc[_» more&period;&period;&period;_]#

Constructs a big integer from a 64&hyphen;bit unsigned value&period;


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:base_uint-0d/2constructor-0a.adoc[base&lowbar;uint](uint64&lowbar;t b);
----

[.small]#xref:base_uint-0d/2constructor-0a.adoc[_» more&period;&period;&period;_]#

Copy&hyphen;constructs a big integer from another of the same width&period;


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:base_uint-0d/2constructor-03.adoc[base&lowbar;uint](xref:base_uint-02.adoc[base&lowbar;uint&lt;256&gt;] const& b) = default;
----

[.small]#xref:base_uint-0d/2constructor-03.adoc[_» more&period;&period;&period;_]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b*
| The value to store in the low 64 bits&period;
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#
