boundp


(boundp  'symbol)

This function verifies whether 'symbol has any value (other than NIL) assigned to it

Arguments

symbol  any Lisp symbol

Return

T if  has any assigned value, NIL otherwise (for an undefined symbol)

Example

(setq x "abc" y nil)

(boundp 'x)  T
(boundp 'y)  NIL
(boundp 'zzz)  NIL

Remarks



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