Infinity (Built-in Mathematica Symbol)

Infinity or \[Infinity] is a symbol that represents a positive infinite quantity.

Inverse (Built-in Mathematica Symbol)

Inverse[m] gives the inverse of a square matrix m.

NumberQ (Built-in Mathematica Symbol)

NumberQ[expr] gives True if expr is a number, and False otherwise.

StieltjesGamma (Built-in Mathematica Symbol)

StieltjesGamma[n] gives the Stieltjes constant \[Gamma]_n. StieltjesGamma[n, a] gives the generalized Stieltjes constant \[Gamma]_n (a).

Edit > Make Template (Mathematica Menu Item)

Make Template inserts a template based on a selected function name.

AbsoluteFileName (Built-in Mathematica Symbol)

AbsoluteFileName["name"] gives the full absolute version of the name for a file in your filesystem.

AlgebraicNumberDenominator (Built-in Mathematica Symbol)

AlgebraicNumberDenominator[a] gives the smallest positive integer n such that n a is an algebraic integer.

Compiled (Built-in Mathematica Symbol)

Compiled is an option for various numerical and plotting functions which specifies whether the expressions they work with should automatically be compiled.

Increment (Built-in Mathematica Symbol)

x++ increases the value of x by 1, returning the old value of x.

NumericQ (Built-in Mathematica Symbol)

NumericQ[expr] gives True if expr is a numeric quantity, and False otherwise.