Function: Euler
Section: transcendental
C-Name: mpeuler
Prototype: p
Help: Euler=Euler(): Euler's constant with current precision.
Description:
 ():real:prec        mpeuler($prec)
Doc: Euler's constant $\gamma=0.57721\cdots$. Note that
 \kbd{Euler} is one of the few reserved names which cannot be used for
 user variables.
