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)