NumericFunction

NumericFunction is an attribute that can be assigned to a symbol f to indicate that f[, , ... ] should be considered a numeric quantity whenever all the are numeric quantities.

Most standard built-in mathematical functions have the attribute NumericFunction.

NumericQ checks the NumericFunction attribute of every function it encounters.

If you assign the attribute NumericFunction to a function that does not yield numerical values, then NumericQ will give misleading results.

See The Mathematica Book: Section 2.5.3 and Section 3.1.2.

See also: NumericQ, NHoldAll.

Further Examples