nan, nanf, nanl
Visual Studio 2015
The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.
The latest version of this topic can be found at nan, nanf, nanl.
Returns a quiet NaN value.
double nan( const char* input ); float nanf( const char* input ); long double nanl( const char* input );
Parameters
input
A string value.
The nan functions return a quiet NaN value.
The nan functions return a floating-point value that corresponds to a quiet (non-signalling) NaN. The input value is ignored. For information about how a NaN is represented for output, see printf, _printf_l, wprintf, _wprintf_l.
| Function | C header | C++ header |
|---|---|---|
nan, nanf, nanl | <math.h> | <cmath> |
Floating-Point Support
_finite, _finitef
_fpclass, _fpclassf
isnan, _isnan, _isnanf
Show: