hpux man page for isunordered

isunordered(3M) 														   isunordered(3M)

NAME
       isunordered() - floating-point comparison macro (unordered)

SYNOPSIS
       floating-expr floating-expr

DESCRIPTION
       The macro determines whether its arguments are unordered.  The arguments are unordered if at least one argument is a NaN.

       The arguments must be of floating type.	For HP Integrity servers, the arguments can be any floating type.  For PA-RISC, each argument must
       be either or

USAGE
       To use the macro, compile either with the default option or with the and options.  Make sure your program includes Link in the math library
       by specifying on the compiler or linker command line.

RETURN VALUE
       The  macro  returns 1 if its arguments are unordered (that is, if either argument is a NaN) and 0 otherwise.  The macro raises no floating-
       point exceptions.

ERRORS
       No errors are defined.

SEE ALSO
       isgreater(3M), isgreaterequal(3M), isless(3M), islessequal(3M), islessgreater(3M), math(5).

STANDARDS CONFORMANCE
																   isunordered(3M)