[#BloombergLP-bslx-TestOutStream-putUint64]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslx.adoc[bslx]::xref:BloombergLP/bslx/TestOutStream.adoc[TestOutStream]::putUint64
:relfileprefix: ../../../
:mrdocs:

Write an eight‐byte unsigned integer value to this stream.

== Synopsis

Declared in `<bslx_testoutstream.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bslx/TestOutStream.adoc[TestOutStream]&
putUint64(xref:BloombergLP/bsls/Types/Uint64.adoc[bsls::Types::Uint64] value);
----

== Description

Write to this stream the one‐byte type indicator for an eight‐byte unsigned integer and the eight‐byte, two's complement unsigned integer (in network byte order) comprised of the least‐significant eight bytes of the specified `value` (in host byte order), and return a reference to this stream. If this stream is initially invalid, this operation has no effect. If the next output operation has been set to be marked invalid (see `makeNextInvalid`), reset this marking and emit the invalid indicator instead of the type indicator.

== Return Value

a reference to this stream

== Parameters

[cols="1,4"]
|===
| Name| Description
| *value*
| value to write
|===


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