std::isnan
From cppreference.com
| Defined in header
<cmath>
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| bool isnan( float arg );
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(since C++11) | |
| bool isnan( double arg );
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(since C++11) | |
| bool isnan( long double arg );
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(since C++11) | |
Determines if the given floating point number arg is not-a-number (NaN).
Contents |
[edit] Parameters
| arg | - | floating point value |
[edit] Return value
true if arg is NaN, false otherwise
[edit] Notes
In C, isnan is a preprocessor macro, rather than a function.
[edit] See also
| (C++11)
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categorizes the given floating point value (function) |
| (C++11)
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checks if the given number has finite value (function) |
| (C++11)
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checks if the given number is infinite (function) |
| (C++11)
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checks if the given number is normal (function) |
| (C++11)
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checks if two floating-point values are unordered (function) |
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C documentation for isnan
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