Placeholder (Built-in Mathematica Symbol)

Placeholder[name] represents a placeholder labeled with name that indicates a place to type.Placeholder[] gives the empty placeholder \[Placeholder].

PrivateEvaluationOptions (Built-in Mathematica Symbol)

PrivateEvaluationOptions -> {opt_1 -> val_1, opt_2 -> val_2} is an option for selections that specifies settings for evaluation-related suboptions.

PrivateFontOptions (Built-in Mathematica Symbol)

PrivateFontOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for selections that specifies settings for various font suboptions.

SpellingOptions (Built-in Mathematica Symbol)

SpellingOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for notebooks that specifies settings for spell checking.

StandardForm (Built-in Mathematica Symbol)

StandardForm[expr] prints as the standard Mathematica two-dimensional representation of expr.

SyntaxForm (Built-in Mathematica Symbol)

SyntaxForm is an option for InterpretationBox and TagBox objects that specifies the precedence level to use when the InterpretationBox or TagBox is considered as an operator.

UnitStep (Built-in Mathematica Symbol)

UnitStep[x] represents the unit step function, equal to 0 for x < 0 and 1 for x >= 0. UnitStep[x_1, x_2, ...] represents the multidimensional unit step function which is 1 ...

$Post (Built-in Mathematica Symbol)

$Post is a global variable whose value, if set, is applied to every output expression.

Random Number Generation (Mathematica Tutorial)

The ability to generate pseudorandom numbers is important for simulating events, estimating probabilities and other quantities, making randomized assignments or selections, ...

PieChart (Built-in Mathematica Symbol)

PieChart[{y_1, y_2, ...}] makes a pie chart with sector angle proportional to y_1, y_2, ....PieChart[{..., w_i[y_i, ...], ..., w_j[y_j, ...], ...}] makes a pie chart with ...