A double-precision floating point number.
Representation of Dart doubles containing double specific constants and operations and specializations of operations inherited from num. Dart doubles are 64-bit floating-point numbers as specified in the IEEE 754 standard.
The double type is contagious. Operations on doubles return double results.
It is a compile-time error for a class to attempt to extend or implement double.
See also:
- num the super class for double.
- Numbers in A tour of the Dart language.
- Inheritance
- Available extensions
Properties
-
address
↔ Pointer<
Never> -
Available on double, provided by the DoubleAddress extension
The memory address of the underlying data.getter/setter pair - hashCode → int
-
Returns a hash code for a numerical value.
no setterinherited
- isFinite → bool
-
Whether this number is finite.
no setterinherited
- isInfinite → bool
-
Whether this number is positive infinity or negative infinity.
no setterinherited
- isNaN → bool
-
Whether this number is a Not-a-Number value.
no setterinherited
- isNegative → bool
-
Whether this number is negative.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- sign → double
-
The sign of the double's numerical value.
no setteroverride
- toJS → JSNumber
-
Available on double, provided by the DoubleToJSNumber extension
Converts this double to a JSNumber.no setter - toJS → JSNumber
-
Available on num, provided by the NumToJSExtension extension
Converts this num to a JSNumber.no setter
Methods
-
abs(
) → double -
The absolute value of this number.
override
-
ceil(
) → int -
Returns the least integer that is not smaller than this number.
override
-
ceilToDouble(
) → double -
Returns the least integer double value no smaller than
this.override -
clamp(
num lowerLimit, num upperLimit) → num -
Returns this num clamped to be in the range
lowerLimit-upperLimit.inherited -
compareTo(
num other) → int -
Compares this to
other.inherited -
floor(
) → int -
Returns the greatest integer no greater than this number.
override
-
floorToDouble(
) → double -
Returns the greatest integer double value no greater than
this.override -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
remainder(
num other) → double -
The remainder of the truncating division of
thisbyother.override -
round(
) → int -
Returns the integer closest to this number.
override
-
roundToDouble(
) → double -
Returns the integer double value closest to
this.override -
toDouble(
) → double -
This number as a double.
inherited
-
toInt(
) → int -
Truncates this num to an integer and returns the result as an int.
inherited
-
toString(
) → String -
Provide a representation of this double value.
override
-
toStringAsExponential(
[int? fractionDigits]) → String -
An exponential string-representation of this number.
inherited
-
toStringAsFixed(
int fractionDigits) → String -
A decimal-point string-representation of this number.
inherited
-
toStringAsPrecision(
int precision) → String -
A string representation with
precisionsignificant digits.inherited -
truncate(
) → int -
Returns the integer obtained by discarding any fractional
part of this number.
override
-
truncateToDouble(
) → double -
Returns the integer double value obtained by discarding any fractional
digits from
this.override
Operators
-
operator %(
num other) → double -
Euclidean modulo of this number by
other.override -
operator *(
num other) → double -
Multiplies this number by
other.override -
operator +(
num other) → double -
Adds
otherto this number.override -
operator -(
num other) → double -
Subtracts
otherfrom this number.override -
operator /(
num other) → double -
Divides this number by
other.override -
operator <(
num other) → bool -
Whether this number is numerically smaller than
other.inherited -
operator <=(
num other) → bool -
Whether this number is numerically smaller than or equal to
other.inherited -
operator ==(
Object other) → bool -
Test whether this value is numerically equal to
other.inherited -
operator >(
num other) → bool -
Whether this number is numerically greater than
other.inherited -
operator >=(
num other) → bool -
Whether this number is numerically greater than or equal to
other.inherited -
operator unary-(
) → double -
Subtracts
otherfrom this number.override -
operator ~/(
num other) → int -
Truncating division operator.
override
Static Methods
Constants
- infinity → const double
- maxFinite → const double
- minPositive → const double
- nan → const double
- negativeInfinity → const double