IntegerQ[expr] gives True if expr is an integer, and False otherwise.
LineIndent is an option for Style and Cell that specifies how many ems of indentation to add at the beginnings of lines for each level of nesting in an expression.
LinkRead[link] reads one expression from the specified MathLink connection. LinkRead[link, h] wraps h around the expression read before evaluating it.
LinkWrite[link, expr] writes expr to the specified MathLink connection.
LQGRegulator[{ss, sensors, finputs}, {w, v, h}, {q, r, p}] constructs the optimal feedback regulator for the StateSpaceModel ss using noisy measurements sensors and feedback ...
MaxStepSize is an option to functions like NDSolve that specifies the maximum size of a single step used in generating a result.
MemoryConstrained[expr, b] evaluates expr, stopping if more than b bytes of memory are requested. MemoryConstrained[expr, b, failexpr] returns failexpr if the memory ...
MenuView[{lbl_1 -> expr_1, lbl_2 -> expr_2, ...}] represents an object in which selecting the menu item with label lbl_i displays expr_i. MenuView[{lbl_1 -> expr_1, lbl_2 -> ...
Missing
(Built-in Mathematica Symbol) Missing[] represents data that is missing.Missing["reason"] specifies a reason for the data being missing.Missing["reason", expr] associates the expression expr with the ...
NumberFormat is an option for NumberForm and related functions that specifies how the mantissa, base, and exponent should be assembled into a final print form.