Difference between revisions of "NaN"
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{{NaN}} | {{NaN}} | ||
| − | <syntaxhighlight lang="pascal" | + | <syntaxhighlight lang="pascal" inline>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" | + | <syntaxhighlight lang="pascal" inline>NaN</syntaxhighlight> is not the same as infinity. |
<syntaxhighlight lang="pascal" line highlight="3-4"> | <syntaxhighlight lang="pascal" line highlight="3-4"> | ||
| Line 13: | Line 13: | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | Note, <syntaxhighlight lang="pascal" | + | Note, <syntaxhighlight lang="pascal" inline>NaN</syntaxhighlight> exists only in the context of floating point number calculations: |
| − | <syntaxhighlight lang="pascal" | + | <syntaxhighlight lang="pascal" inline>0 div 0</syntaxhighlight> ([[Div|integer division]]) is not allowed, though. |
== See also == | == See also == | ||
Latest revision as of 17:16, 6 August 2022
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English (en) │
suomi (fi) │
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.
1program NotANumber(input, output, stderr);
2begin
3 // writes 'Nan' (with spacing) on its own line
4 writeLn(0/0);
5end.
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”
