[#BloombergLP-bdlc-BitArray-swapBits]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/BitArray.adoc[BitArray]::swapBits
:relfileprefix: ../../../
:mrdocs:

Exchange the bit values at `index1` and `index2`.

== Synopsis

Declared in `<bdlc_bitarray.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
swapBits(
    std::size_t index1,
    std::size_t index2);
----

== Description

Efficiently exchange the values of the bits at the specified `index1` and `index2` indices. The behavior is undefined unless `index1 < length()` and `index2 < length()`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *index1*
| first bit position to exchange
| *index2*
| second bit position to exchange
|===


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