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3.2 Mathematical constants
Constants are represented as functions with no arguments and must be
called as such. For instance, the mathematical constant π must be
written in a Stan program as pi()
.
real
pi
()
π, the ratio of a circle’s circumference to its diameter
Available since 2.0
real
e
()
e, the base of the natural logarithm
Available since 2.0
real
sqrt2
()
The square root of 2
Available since 2.0
real
log2
()
The natural logarithm of 2
Available since 2.0
real
log10
()
The natural logarithm of 10
Available since 2.0