[#BloombergLP-bdlb-BitUtil-numLeadingUnsetBits-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/BitUtil.adoc[BitUtil]::numLeadingUnsetBits
:relfileprefix: ../../../
:mrdocs:

Return the number of consecutive 0 bits starting from the most‐significant bit in the specified `value`.

== Synopsis

Declared in `<bdlb_bitutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
int
numLeadingUnsetBits(unsigned int value);
----


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