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std::isunordered

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Template:ddcl list begin <tr class="t-dsc-header">

<td>
Defined in header <cmath>
</td>

<td></td> <td></td> <tr class="t-dcl ">

<td >
bool isunordered( float x, float y );
</td>

<td class="t-dcl-nopad"> </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

<td >
bool isunordered( double x, double y );
</td>

<td class="t-dcl-nopad"> </td> <td > (since C++11) </td> </tr> <tr class="t-dcl ">

<td >
bool isunordered( long double x, long double y );
</td>

<td class="t-dcl-nopad"> </td> <td > (since C++11) </td> </tr> Template:ddcl list end

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.

Parameters

x - floating point value
y - floating point value

Return value

true if either x or y is NaN, false otherwise

See also

Template:cpp/numeric/math/dcl list fpclassifyTemplate:cpp/numeric/math/dcl list isnan