| Defined in header <cmath> | ||
|---|---|---|
bool isunordered( float x, float y ); | (1) | (since C++11) |
bool isunordered( double x, double y ); | (2) | (since C++11) |
bool isunordered( long double x, long double y ); | (3) | (since C++11) |
bool isunordered( Arithmetic x, Arithmetic y ); | (4) | (since C++11) |
1-3) Determines if the floating point numbers
x and y are unordered, that is, one or both are NaN and thus cannot be meaningfully compared with each other. 4) A set of overloads or a function template for all combinations of arguments of arithmetic type not covered by (1-3). If any argument has integral type, it is cast to
double.Parameters
| x | - | floating point value |
| y | - | floating point value |
Return value
true if either x or y is NaN, false otherwise.
See also
| (C++11) | categorizes the given floating point value (function) |
| (C++11) | checks if the given number is NaN (function) |
C documentation for isunordered | |
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