Defined in header <float.h>
#define FLT_ROUNDS /* implementation defined */
(since C99)

Returns the current rounding direction of floating-point arithmetic operations.

Value Explanation
-1 the default rounding direction is not known
0 toward zero, FE_TOWARDZERO
1 to nearest, FE_TONEAREST
2 towards positive infinity, FE_UPWARD
3 towards negative infinity, FE_DOWNWARD
other values implementation-defined behavior


The rounding mode can be changed with fesetround and FLT_ROUNDS reflects that change.

See also

gets or sets rounding direction
C++ documentation for FLT_ROUNDS

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