LISP: ZEROP
C: Lzerop
min args: 1
max args: 1
[F][CLTL 12]
SYNOPSIS:
zerop number
DESCRIPTION:
This predicate is true if number is zero (either the integer zero or a floating-point zero) and is false otherwise. Since there are not distinct representations for positive and negative floating-point zeros, (zerop -0.0) is always true. It is an error if the argument is not a number.