.IR x ,
these functions will return the largest representable number less than
.IR x .
-
+.PP
If
.I x
equals
.IR y ,
the functions return
.IR y .
-
+.PP
The
.BR nexttoward (),
.BR nexttowardf (),
.I x
in the direction of
.IR y .
-
+.PP
If
.I x
equals
(cast to the same type as
.IR x )
is returned.
-
+.PP
If
.I x
or
.I y
is a NaN,
a NaN is returned.
-
+.PP
If
.I x
is finite,
or
.BR HUGE_VALL ,
respectively, with the correct mathematical sign.
-
+.PP
If
.I x
is not equal to