Apropos

boundpFunction

    Syntax

    boundp symbol generalized-boolean

    Arguments and Values

    symbol — a symbol.

    generalized-boolean — a generalized boolean.

    Description

    Returns true if symbol is bound; otherwise, returns false.

    Examples
    (setq x 1)  1 
    (boundp 'x)  true 
    (makunbound 'x)  X 
    (boundp 'x)  false 
    (let ((x 2)) (boundp 'x))  false 
    (let ((x 2)) (declare (special x)) (boundp 'x))  true
    Exceptional Situations

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

    See Also

    set, setq, symbol-value, makunbound

    Notes

    The function bound determines only whether a symbol has a value in the global environment; any lexical bindings are ignored.