[#uint256-IsNull]
= xref:uint256.adoc[uint256]::IsNull
:relfileprefix: ../
:mrdocs:

Returns true if every byte of the blob is zero&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
bool
IsNull() const;
----

== Return Value

true if all bytes of the blob are zero&period;


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