functions
macro constants
types
constant
<cmath> <ctgmath>
NAN
Not-A-Number
Macro constant that expands to an expression of type float that represents a NaN if the implementation supports quiet NaNs (otherwise, it is not defined).
See also
- nan
- Generate quiet NaN (function)
- nanf
- Generate quiet NaN (float) (function)
- isnan
- Is Not-A-Number (macro/function)