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10.2.18 makunbound [Function]

makunbound symbolsymbol

Arguments and Values::

symbol—a symbol

Description::

Makes the symbol be unbound, regardless of whether it was previously bound.

Examples::
      (setf (symbol-value 'a) 1)
      (boundp 'a) ⇒  true
      a ⇒  1
      (makunbound 'a) ⇒  A
      (boundp 'a) ⇒  false
Side Effects::

The value cell of symbol is modified.

Exceptional Situations::

Should signal an error of type type-error if symbol is not a symbol.

See Also::

boundp , fmakunbound