Syntax:
zerop number => generalized-boolean
Pronunciation:
['zee(,)roh(,)pee]
Arguments and Values:
number---a number.
generalized-boolean---a generalized boolean.
Description:
Returns true if number is zero (integer, float, or complex); otherwise, returns false.
Regardless of whether an implementation provides distinct representations for positive and negative floating-point zeros, (zerop -0.0) always returns true.
Examples:
(zerop 0) => true (zerop 1) => false (zerop -0.0) => true (zerop 0/100) => true (zerop #c(0 0.0)) => true
Side Effects: None.
Affected By: None.
Exceptional Situations:
Should signal an error of type type-error if number is not a number.
See Also: None.
Notes:
(zerop number) == (= number 0)
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