description

# roundToDouble abstract method

double roundToDouble()
override

Returns the integer double value closest to `this`.

Rounds away from zero when there is no closest integer: `(3.5).roundToDouble() == 4` and `(-3.5).roundToDouble() == -4`.

If this is already an integer valued double, including `-0.0`, or it is not a finite value, the value is returned unmodified.

For the purpose of rounding, `-0.0` is considered to be below `0.0`, and `-0.0` is therefore considered closer to negative numbers than `0.0`. This means that for a value `d` in the range `-0.5 < d < 0.0`, the result is `-0.0`.

    print(3.0.roundToDouble()); // 3.0
    print(3.25.roundToDouble()); // 3.0
    print(3.5.roundToDouble()); // 4.0
    print(3.75.roundToDouble()); // 4.0
    print((-3.5).roundToDouble()); // -4.0

## Implementation

    double roundToDouble();