[#mp_units-pi_c-0e]
= xref:mp_units.adoc[mp&lowbar;units]::pi&lowbar;c
:relfileprefix: ../
:mrdocs:

The unique instance of the pi magnitude constant&period;

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;framework&sol;unit&lowbar;magnitude&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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inline constexpr xref:mp_units/pi_c-0b.adoc[pi&lowbar;c] pi&lowbar;c;
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