XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (528 page)
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Authors: Michael Kay
BOOK: XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition
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If the argument value is an
xs:double
or
xs:float
greater than -1.0 but less than zero it will be rounded up to negative zero. For most practical purposes, negative zero and positive zero are indistinguishable, but dividing a number by negative zero produces negative infinity, while dividing by positive zero produces positive infinity.
Examples
| Expression | Result |
| ceiling(1.0) | xs:decimal 1.0, displayed as 1 |
| ceiling(1.6) | xs:decimal 2.0, displayed as2 |
| ceiling(17 div 3) | xs:decimal 6.0, displayed as6 |
| ceiling(-3.0) | xs:decimal −3.0, displayed as-3 |
| ceiling(-8.2e0) | xs:double −8.0e0, displayed as-8 |
| ceiling(number(‘xxx’)) | xs:double NaN, displayed asNaN |
| ceiling(-0.5e0) | xs:double −0.0e0, displayed as-0 |
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