[discrete]
[[esql-pi]]
=== `PI`

*Syntax*

[.text-center]
image::esql/functions/signature/pi.svg[Embedded,opts=inline]

*Description*

Returns the {wikipedia}/Pi[ratio] of a circle's circumference to its diameter.

*Example*

[source.merge.styled,esql]
----
include::{esql-specs}/math.csv-spec[tag=pi]
----
[%header.monospaced.styled,format=dsv,separator=|]
|===
include::{esql-specs}/math.csv-spec[tag=pi-result]
|===