WhitespaceCharacter (Built-in Mathematica Symbol)

WhitespaceCharacter represents a single whitespace character in StringExpression.

WindowFloating (Built-in Mathematica Symbol)

WindowFloating is a notebook option that specifies whether the window for the notebook should float on top of other windows when it is displayed on the screen.

WindowStatusArea (Built-in Mathematica Symbol)

WindowStatusArea is a notebook option that specifies what should appear in the status area in the frame of the window used to display the notebook.

Word (Built-in Mathematica Symbol)

Word represents a word in Read, Find, and related functions.

WriteString (Built-in Mathematica Symbol)

WriteString[channel, expr_1, expr_2, ...] converts the expr_i to strings, and then writes them in sequence to the specified output channel.

$Context (Built-in Mathematica Symbol)

$Context is a global variable that gives the current context.

$InitialDirectory (Built-in Mathematica Symbol)

$InitialDirectory gives the initial directory when the current Mathematica session was started.

$Input (Built-in Mathematica Symbol)

$Input is a global variable whose value is the name of the stream from which input to Mathematica is currently being sought.

$MachineName (Built-in Mathematica Symbol)

$MachineName is a string that gives the assigned name of the computer on which Mathematica is being run, if such a name is defined.

Combining Lists (Mathematica Tutorial)

Functions for combining lists. Join concatenates any number of lists together. Union combines lists, keeping only distinct elements.