[#arith_uint256-operator_plus_eq]
= xref:arith_uint256.adoc[arith_uint256]::operator+=
:relfileprefix: ../
:mrdocs:

Addition assignment operators

== Synopses

Declared in `<arith_uint256.h>`

Adds a 64‐bit value to this big integer in place.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:base_uint-02.adoc[base_uint<256>]&
xref:base_uint-0d/operator_plus_eq-01a.adoc[operator+=](uint64_t b64);
----

[.small]#xref:base_uint-0d/operator_plus_eq-01a.adoc[_» more..._]#

Adds another big integer to this value in place.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:base_uint-02.adoc[base_uint<256>]&
xref:base_uint-0d/operator_plus_eq-09.adoc[operator+=](xref:base_uint-02.adoc[base_uint<256>] const& b);
----

[.small]#xref:base_uint-0d/operator_plus_eq-09.adoc[_» more..._]#

== Return Value

A reference to this object.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b64*
| The value to add.
| *b*
| The value to add.
|===


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