An expression is of type builtin if it is a procedure with option builtin. (See option.) This type helps to identify those procedures that are implemented in the Maple kernel, rather than the library.

It may be used with anames to list all builtin procedures. For example anames(builtin).

type/procedure

$\mathrm{type}\left(a\left[2,3\right]\,'\mathrm{builtin}'\right)$

$\mathrm{false}$

$\mathrm{type}\left(\mathrm{subs}\,'\mathrm{builtin}'\right)$

$\mathrm{true}$

$\mathrm{type}\left(\mathrm{int}\,'\mathrm{builtin}'\right)$

$\mathrm{false}$