Editing NaN (section)

== Integer NaN ==
Most fixed-size [[integer]] formats cannot explicitly indicate invalid data. In such a case, when converting NaN to an integer type, the [[IEEE&nbsp;754]] standard requires that the invalid-operation [[IEEE 754#Exception handling|exception]] be signaled. For example in [[Java programming language|Java]], such operations throw instances of {{code|java.lang.ArithmeticException}}.<ref>{{cite web|url=http://docs.oracle.com/javase/8/docs/api/java/lang/ArithmeticException.html|title=ArithmeticException (Java Platform SE&nbsp;8)|website=docs.oracle.com}}</ref> In [[C (programming language)|C]], they lead to [[undefined behavior]], but if annex&nbsp;F is supported, the operation yields an "invalid" floating-point exception (as required by the IEEE standard) and an unspecified value.

[[Perl]]'s {{code|Math::BigInt}} package uses "NaN" for the result of strings that do not represent valid integers.<ref>{{cite web|title=<code>Math::BigInt</code>|url=http://perldoc.perl.org/Math/BigInt.html#Input|website=perldoc.perl.org|access-date=12 June 2015}}</ref>
<syntaxhighlight lang="console">
> perl -mMath::BigInt -e "print Math::BigInt->new('foo')"
NaN
</syntaxhighlight>