NAN
From cppreference.com
| Defined in header <cmath>
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| #define NAN /*implementation defined*/ |
(since C++11) | |
The macro NAN expands to constant expression of type float which evaluates to a quiet not-a-number (QNaN) value. If the implementation does not support QNaNs, this macro constant is not defined.
[edit] See also
| (C++11)(C++11)(C++11) |
not-a-number (NaN) (function) |
| (C++11) |
checks if the given number is NaN (function) |
| [static] |
identifies floating-point types that can represent the special value "quiet not-a-number" (NaN) (public static member constant of std::numeric_limits)
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| [static] |
identifies floating-point types that can represent the special value "signaling not-a-number" (NaN) (public static member constant of std::numeric_limits)
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| [static] |
returns a quiet NaN value of the given floating-point type (public static member function of std::numeric_limits)
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| [static] |
returns a signaling NaN value of the given floating-point type (public static member function of std::numeric_limits)
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| C documentation for NAN
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