RoundingMode enum

Defines standard rounding modes for numerical rounding

Inheritance
Available extensions

Values

floor → const RoundingMode

Rounds towards negative infinity

Example:

Rational.parse("-2.7").rounded(RoundingMode.floor); // -3
Rational.parse("2.7").rounded(RoundingMode.floor);  // 2
ceil → const RoundingMode

Rounds towards positive infinity

Example:

Rational.parse("-2.3").rounded(RoundingMode.ceil); // -2
Rational.parse("2.3").rounded(RoundingMode.ceil);  // 3
truncate → const RoundingMode

Rounds towards zero (truncates fractional part)

Example:

Rational.parse("-2.7").rounded(RoundingMode.truncate); // -2
Rational.parse("2.7").rounded(RoundingMode.truncate);  // 2
up → const RoundingMode

Rounds away from zero, increasing the magnitude of the number

  • Positive values round up (toward +∞)
  • Negative values round down (toward -∞)

Example:

Rational.parse("-2.3").rounded(RoundingMode.up); // -3
Rational.parse("2.3").rounded(RoundingMode.up);  // 3
Rational.parse("-2.9").rounded(RoundingMode.up); // -3
Rational.parse("2.9").rounded(RoundingMode.up);  // 3
halfUp → const RoundingMode

Rounds to the nearest integer using half-up rounding

  • If the fractional part is >= 0.5, rounds up
  • Otherwise, rounds down

Example:

Rational.parse("2.5").rounded(RoundingMode.halfUp);  // 3
Rational.parse("2.4").rounded(RoundingMode.halfUp);  // 2
Rational.parse("-2.5").rounded(RoundingMode.halfUp); // -3
halfDown → const RoundingMode

Rounds to the nearest integer using half-down rounding

  • If the fractional part is > 0.5, rounds up
  • Otherwise, rounds down

Example:

Rational.parse("2.5").rounded(RoundingMode.halfDown);  // 2
Rational.parse("2.6").rounded(RoundingMode.halfDown);  // 3
Rational.parse("-2.5").rounded(RoundingMode.halfDown); // -2
halfEven → const RoundingMode

Rounds to the nearest even integer in case of a tie

Example:

Rational.parse("2.5").rounded(RoundingMode.halfEven);  // 2
Rational.parse("3.5").rounded(RoundingMode.halfEven);  // 4
Rational.parse("-2.5").rounded(RoundingMode.halfEven); // -2
Rational.parse("-3.5").rounded(RoundingMode.halfEven); // -4

Properties

hashCode → int
The hash code for this object.
no setterinherited
index → int
A numeric identifier for the enumerated value.
no setterinherited
name → String

Available on Enum, provided by the EnumName extension

The name of the enum value.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Constants

values → const List<RoundingMode>
A constant List of the values in this enum, in order of their declaration.