An expression $e$ (typically a module) can be converted to a package by using the call convert( e, 'package' ). The resulting package is returned.

If the input expression e is already a package, then it is returned unchanged.

If the input expression e is a module that is not a package, it is converted, in place, to a package and returned. No other expression may be converted to a package.

The main purpose of this conversion is to repair modules that are intended to be packages, but have not been correctly formed because of the omission of the package option.

m := module()
    export addSquares;
        addSquares:= proc(a,b)
        description "finds the sum of the squares of a and b";
        a^2+b^2
        end proc
end module:

$\mathrm{addSquares}\left(2\,3\right)$

$\mathrm{addSquares}\left(2\,3\right)$

$m:-\mathrm{addSquares}\left(2\,3\right)$

$13$

$\mathrm{with}\left(m\right)$

$\mathrm{type}\left(m\,'\mathrm{package}'\right)$

$\mathrm{false}$

$\mathrm{convert}\left(m\,'\mathrm{package}'\right)\:$

$\mathrm{type}\left(m\,'\mathrm{package}'\right)$

$\mathrm{true}$

$\mathrm{with}\left(m\right)\;$$\mathrm{addSquares}\left(2\,3\right)$

$\left[\mathrm{addSquares}\right]$

$13$