BesselY (Built-in Mathematica Symbol)

BesselY[n, z] gives the Bessel function of the second kind Y_n (z).

BitGet (Built-in Mathematica Symbol)

BitGet[n, k] gets the bit corresponding to the coefficient of 2^k in the integer n.

BitNot (Built-in Mathematica Symbol)

BitNot[n] gives the bitwise NOT of the integer n.

Blank (Built-in Mathematica Symbol)

_or Blank[] is a pattern object that can stand for any Mathematica expression. _h or Blank[h] can stand for any expression with head h.

Bookmarks (Built-in Mathematica Symbol)

Bookmarks is an option for Manipulate and related functions that gives a list of bookmark settings.

CellAutoOverwrite (Built-in Mathematica Symbol)

CellAutoOverwrite is an option for Cell which specifies whether an output cell should be overwritten by new output when the preceding input cell is evaluated.

CellBracketOptions (Built-in Mathematica Symbol)

CellBracketOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for cells that specifies settings for cell brackets.

ChebyshevT (Built-in Mathematica Symbol)

ChebyshevT[n, x] gives the Chebyshev polynomial of the first kind T_n (x).

Chop (Built-in Mathematica Symbol)

Chop[expr] replaces approximate real numbers in expr that are close to zero by the exact integer 0.

C (Built-in Mathematica Symbol)

C[i] is the default form for the i\[Null]\[Null]^th parameter or constant generated in representing the results of various symbolic computations.