double truncateToDouble( )

Returns the integer double value obtained by discarding any fractional digits from this.

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. A number d in the range -1.0 < d < 0.0 will return -0.0, and in the range 0.0 < d < 1.0 it will return 0.0.

Source

/**
 * Returns the integer double value obtained by discarding any fractional
 * digits from `this`.
 *
 * 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`.
 * A number `d` in the range `-1.0 < d < 0.0` will return `-0.0`, and
 * in the range `0.0 < d < 1.0` it will return 0.0.
 */
double truncateToDouble();