[#BloombergLP-bdlde-Sha224-2constructor-076] = xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlde.adoc[bdlde]::xref:BloombergLP/bdlde/Sha224.adoc[Sha224]::Sha224 :relfileprefix: ../../../ :mrdocs: Construct a SHA‐2 digest having the value corresponding to no data having been provided. == Synopsis Declared in `<bdlde_sha2.h>` [source,cpp,subs="verbatim,replacements,macros,-callouts"] ---- Sha224(); ---- [.small]#Created with https://www.mrdocs.com[MrDocs]#