[#base_uint-0d-operator_assign-04]
= xref:base_uint-0d.adoc[base_uint<256>]::operator=
:relfileprefix: ../
:mrdocs:

Assignment operators

== Synopses

Declared in `<arith_uint256.h>`

Assigns a 64‐bit unsigned value to this big integer.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:base_uint-02.adoc[base_uint<256>]&
xref:base_uint-0d/operator_assign-0a.adoc[operator=](uint64_t b);
----

[.small]#xref:base_uint-0d/operator_assign-0a.adoc[_» more..._]#

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


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:base_uint-02.adoc[base_uint<256>]&
xref:base_uint-0d/operator_assign-0f.adoc[operator=](xref:base_uint-02.adoc[base_uint<256>] const& b) = default;
----

[.small]#xref:base_uint-0d/operator_assign-0f.adoc[_» more..._]#

== Return Value

A reference to this object.

== Parameters

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


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