isunordered(3M)isunordered(3M)NAMEisunordered() - floating-point comparison macro (unordered)
SYNOPSIS
floating-expr floating-expr
DESCRIPTION
The macro determines whether its arguments are unordered. The argu‐
ments 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 ALSOisgreater(3M), isgreaterequal(3M), isless(3M), islessequal(3M), isless‐
greater(3M), math(5).
STANDARDS CONFORMANCEisunordered(3M)