isunordered [V1.09 or later]
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This function determines whether the arguments are unordered.
[Classification]
Mathematical library
[Syntax]
#include <math.h>
int isunordered(real-floating x, real-floating y); (C99)
[Return value]
Returns 1 when the arguments are unordered and 0 otherwise.
[Description]
This function determines whether the arguments are unordered.