This procedure unassigns all the unevaluated names given as input. The value returned by unassign is NULL.

If any namei is of type indexed, then op(0,namei) must be either a table or a table-based array.

$a≔1\:$

$a$

$1$

$\mathrm{unassign}\left('a'\right)$

$a$

$a$

$T≔\mathrm{table}\left(\left\{\left(1\,1\right)=1\,\left(2\,2\right)=2\right\}\right)$

$T≔table\left(\left[\left(2\,2\right)=2\,\left(1\,1\right)=1\right]\right)$

$\mathrm{unassign}\left('T\left[1,1\right]'\right)$

$T\left[1,1\right]$

$T_{1,1}$

$\left\{\mathrm{entries}\left(T\,'\mathrm{pairs}'\right)\right\}$

$\left\{\left(2\,2\right)=2\right\}$