EulerGamma
EulerGamma is Euler's constant γ, with numerical value ≈ 0.577216.
Examples
Numerical value of Euler's constant:
N[EulerGamma]
(* 0.577216 *)Use in expressions:
Limit[Sum[1/k, {k, 1, n}] - Log[n], n -> Infinity]
(* EulerGamma *)Please visit the official Wolfram Language Reference for more details.