| Category | Library procedure | ||||||
| Format | (negative? num) | ||||||
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| Description | negative? returns #t, if num is negative. Otherwise it returns #f. See also positive? and zero?. | ||||||
| R4RS Compliance | Full | ||||||
| Examples |
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| Category | Native procedure | |||
| Format | (newline [outport]) | |||
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| Description | newline prints a linefeed character to the output field or to the output port outport. newline returns the line feed character. For related information, see display and write. | |||
| R4RS Compliance | Full | |||
| Examples |
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| Category | Primitive procedure | ||||||
| Format | (none? obj) | ||||||
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| Description | none? returns #t for #n and #f for any other object. | ||||||
| R4RS Compliance | LispMe extension | ||||||
| Examples |
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| Category | Primitive procedure | |||||||||
| Format | (not obj) | |||||||||
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| Description | not returns #t if obj is false, otherwise it returns #t. Remember that in LispMe () and #f are distinct objects, so not is not the same procedure as null?. | |||||||||
| R4RS Compliance | Full | |||||||||
| Examples |
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| Category | Primitive procedure | |||||||||
| Format | (null? obj) | |||||||||
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| Description | null? returns #t for the empty list () and #f for any other object. Remember that in LispMe () and #f are distinct objects, so null? is not the same procedure as not. | |||||||||
| R4RS Compliance | Full | |||||||||
| Examples |
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| Category | Primitive procedure | ||||||||||||
| Format | (number? obj) | ||||||||||||
| Parameters |
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| Description | number? returns #t for integer, real and complex numbers and #f for any other object. | ||||||||||||
| R4RS Compliance | Full | ||||||||||||
| Examples |
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