23 lines
363 B
Markdown
23 lines
363 B
Markdown
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# Boolean Logic
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## `not`
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```
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(not value)
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```
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`not` returns nil if `value` is non-nil, otherwise, it returns `t`.
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## `or`
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```
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(or &rest values)
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```
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`or` returns its first non-nil argument, or nil if all arguments are
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nil.
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## `and`
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```
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(and &rest values)
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```
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`and` returns its last argument if all arguments are non-nil, or nil if
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it encounters a nil argument.
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