[#base_uint-02-2constructor-025]
= xref:base_uint-02.adoc[base_uint]::base_uint
:relfileprefix: ../
:mrdocs:

Constructors

== Synopses

Declared in `<arith_uint256.h>`

Constructs a big integer with a value of zero.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:base_uint-02/2constructor-0d.adoc[base_uint]();
----

[.small]#xref:base_uint-02/2constructor-0d.adoc[_» more..._]#

Copy‐constructs a big integer from another of the same width.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:base_uint-02/2constructor-0b.adoc[base_uint](xref:base_uint-02.adoc[base_uint] const& b) = default;
----

[.small]#xref:base_uint-02/2constructor-0b.adoc[_» more..._]#

Constructs a big integer from a 64‐bit unsigned value.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:base_uint-02/2constructor-028.adoc[base_uint](uint64_t b);
----

[.small]#xref:base_uint-02/2constructor-028.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b*
| The value to copy.
|===


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