SEARCH MATHEMATICA 8 DOCUMENTATION

THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.
SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION.

Mathematica > Attributes >

Built-in Mathematica Symbol

Tutorials »|See Also »|More About »

NumericFunction

NumericFunction
is an attribute that can be assigned to a symbol f to indicate that f[arg₁, arg₂, ...] should be considered a numeric quantity whenever all the arg_i are numeric quantities.

MORE INFORMATION

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.

EXAMPLES

CLOSE ALL

Basic Examples (1)

Exp has the NumericFunction attribute:

In[1]:=

Out[1]=

When Exp has an argument that is a number, constant, or numeric, the result is numeric:

In[2]:=

Out[2]=

In most cases when NumericQ[expr] gives True, then N[expr] yields an explicit number:

In[3]:=

Out[3]=

Scope (2)

Applications (1)