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

Return `numBits` bits beginning at `index` as low‐order return bits.

== Synopsis

Declared in `<bdlc_bitarray.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
uint64_t
bits(
    std::size_t index,
    std::size_t numBits) const;
----

== Description

Return the specified `numBits` beginning at the specified `index` in this array as the low‐order bits of the returned value. The behavior is undefined unless `numBits <= sizeof(uint64_t) * CHAR_BIT` and `index + numBits <= length()`.

== Return Value

requested bits as the low‐order bits of the returned value

== Parameters

[cols="1,4"]
|===
| Name| Description
| *index*
| starting bit position to read
| *numBits*
| number of bits to return
|===


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