FileExtension["file"] gives the file extension for a file name.

LinkReadyQ[link] tests whether there is an expression ready to read from the specified MathLink connection. LinkReadyQ[link, t] waits for up to t seconds to see if an ...

MorphologicalGraph[image] gives a graph object that represents the connectivity of the morphological branch points and endpoints of the objects in image after applying ...

lhs === rhs yields True if the expression lhs is identical to rhs, and yields False otherwise.

$BatchInput is True if input in the current session is being fed directly to the Mathematica kernel in batch mode.

Integration functions. Here is the integral ∫_a^bx^2 dx. This gives the multiple integral ∫_0^adx ∫_0^bd y(x^2+y^2).

Turning conditions into numbers. Boole[expr] is a basic function that turns True and False into 1 and 0. It is sometimes known as the characteristic function or indicator ...

ControllerState["c"] gives the state of the control c for the first connected controller device on which it is supported.ControllerState[{"c_1", "c_2", ...}] gives the states ...

CreateDialog[expr] creates a dialog notebook containing expr and opens it in the front end.CreateDialog[expr, obj] replaces the notebook represented by the notebook object ...

BiconnectedQ[g] yields True if graph g is biconnected. If g is directed, the underlying undirected graph is used.