naginterfaces.library.math.pi

naginterfaces.library.math.pi()

pi returns the numerical value of $\pi$.

For full information please refer to the NAG Library document for x01aa

https://support.nag.com/numeric/nl/nagdoc_30.2/flhtml/x01/x01aaf.html

Returns

pi_nagfloat

The numerical value of $\pi$.