Difference between revisions of "NaN"
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{{NaN}} | {{NaN}} | ||
| − | < | + | <syntaxhighlight lang="pascal" enclose="none">NaN</syntaxhighlight> (not a number) is a numeric data type value representing an undefined or unrepresentable value. |
These values result from operations which have undefined numerical results. | These values result from operations which have undefined numerical results. | ||
| − | < | + | <syntaxhighlight lang="pascal" enclose="none">NaN</syntaxhighlight> is not the same as infinity. |
| − | <syntaxhighlight> | + | <syntaxhighlight lang="pascal" line start="0" highlight="3-4"> |
program NotANumber(input, output, stderr); | program NotANumber(input, output, stderr); | ||
begin | begin | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
| − | Note, < | + | Note, <syntaxhighlight lang="pascal" enclose="none">NaN</syntaxhighlight> exists only in the context of floating point number calculations: |
| − | < | + | <syntaxhighlight lang="pascal" enclose="none">0 div 0</syntaxhighlight> ([[Div|integer division]]) is not allowed, though. |
== See also == | == See also == | ||
Revision as of 17:50, 11 February 2018
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English (en) │
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русский (ru) │
NaN (not a number) is a numeric data type value representing an undefined or unrepresentable value.
These values result from operations which have undefined numerical results.
NaN is not the same as infinity.
0program NotANumber(input, output, stderr);
1begin
2 // writes 'Nan' (with spacing) on its own line
3 writeLn(0/0);
4end.
Note, NaN exists only in the context of floating point number calculations:
0 div 0 (integer division) is not allowed, though.
See also
- Value “is not a number”
IsNanchecks whether value is “not a number”.TAChartdocumentation, § “skipping source items”
