Determine whether this number is zero.
If number is a real number or an integer and it is a zero value, the zerop function returns a T. Otherwise, it returns a nil.
Examples
| Code | Returns |
|---|---|
| (zerop 0) | T |
| (zerop 0.5) | nil |
| (zerop 0.0000) | T |
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Programming Overview of LISP (LISt Processing) Language
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