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 as
2
ceiling(17 div 3)
xs:decimal 6.0, displayed as
6
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 as
NaN
ceiling(-0.5e0)
xs:double −0.0e0, displayed as
-0

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