CatalanNumber[n] gives the n\[Null]^th Catalan number C_n.
Catch
(Built-in Mathematica Symbol) Catch[expr] returns the argument of the first Throw generated in the evaluation of expr. Catch[expr, form] returns value from the first Throw[value, tag] for which form ...
CDFDeploy["file.cdf", expr] deploys expr in a form that can be played by Wolfram CDF Player.CDFDeploy["file.cdf", notebook] deploys a notebook.CDFDeploy["file.cdf", ...
CellMargins is an option for Cell that specifies the absolute margins in printer's points to leave around a cell.
CForm
(Built-in Mathematica Symbol) CForm[expr] prints as a C language version of expr.
ChanVeseBinarize[image] finds a two-level segmentation of image by computing optimal contours around regions of consistent intensity in image.ChanVeseBinarize[image, marker] ...
Characters["string"] gives a list of the characters in a string.
ChartStyle is an option for charting functions that specifies styles in which chart elements should be drawn.
ChebyshevT[n, x] gives the Chebyshev polynomial of the first kind T_n (x).
ChebyshevU[n, x] gives the Chebyshev polynomial of the second kind U_n (x).