is treated when the result cannot be exactly represented in the significand.
Various rounding modes may be provided:
round to nearest (the default),
-round up (towards positive infinity),
-round down (towards negative infinity), and
-round towards zero.
+round up (toward positive infinity),
+round down (toward negative infinity), and
+round toward zero.
Each of the macros
.BR FE_TONEAREST ,
.IP \-1
The rounding mode is not determinable.
.IP 0
-Rounding is towards 0.
+Rounding is toward 0.
.IP 1
-Rounding is towards nearest number.
+Rounding is toward nearest number.
.IP 2
-Rounding is towards positive infinity.
+Rounding is toward positive infinity.
.IP 3
-Rounding is towards negative infinity.
+Rounding is toward negative infinity.
.PP
Other values represent machine-dependent, nonstandard rounding modes.
.PP