std::isnan
From cppreference.com
Defined in header
<cmath>
|
||
bool isnan( float arg );
|
(since C++11) | |
bool isnan( double arg );
|
(since C++11) | |
bool isnan( long double arg );
|
(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)
|
categorizes the given floating point value (function) |
(C++11)
|
checks if the given number has finite value (function) |
(C++11)
|
checks if the given number is infinite (function) |
(C++11)
|
checks if the given number is normal (function) |
(C++11)
|
checks if two floating-point values are unordered (function) |
C documentation for isnan
|