[#bsl-bitset-none]
= xref:bsl.adoc[bsl]::xref:bsl/bitset.adoc[bitset]::none
:relfileprefix: ../../
:mrdocs:

Return `true` if all the bits in this bitset has the value of 0 and `false` otherwise. Note that `all()` and `none()` are both true for bitsets of size 0.

== Synopsis

Declared in `<bslstl_bitset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
none() const noexcept;
----


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