dart:core
double class
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.
- Inheritance
Constructors
- double()
Properties
- sign → double
read-only
- Returns the sign of the double's numerical value. [...]
- hashCode → int
read-only, inherited
- The hash code for this object. [...]
- isFinite → bool
read-only, inherited
- True if the number is finite; otherwise, false. [...]
- isInfinite → bool
read-only, inherited
- True if the number is positive infinity or negative infinity; otherwise, false.
- isNaN → bool
read-only, inherited
- True if the number is the double Not-a-Number value; otherwise, false.
- isNegative → bool
read-only, inherited
- True if the number is negative; otherwise, false. [...]
- runtimeType → Type
read-only, inherited
- A representation of the runtime type of the object.
Methods
- abs() → double
- Returns the absolute value of this double.
- ceil() → int
- Returns the least integer no smaller than
this. [...] - ceilToDouble() → double
- Returns the least integer double value no smaller than
this. [...] - floor() → int
- Returns the greatest integer no greater than
this. [...] - floorToDouble() → double
- Returns the greatest integer double value no greater than
this. [...] - remainder(num other) → double
- Returns the remainder of the truncating division of
this by other. [...] - round() → int
- Returns the integer closest to
this. [...] - roundToDouble() → double
- Returns the integer double value closest to
this. [...] - toString() → String
- Provide a representation of this double value. [...]
- truncate() → int
- Returns the integer obtained by discarding any fractional digits from
this. [...] - truncateToDouble() → double
- Returns the integer double value obtained by discarding any fractional digits from
this. [...] - clamp(num lowerLimit, num upperLimit) → num
inherited
- Returns this num clamped to be in the range
lowerLimit-upperLimit. [...] - compareTo(num other) → int
inherited
- Compares this to
other. [...] - noSuchMethod(Invocation invocation) → dynamic
inherited
- Invoked when a non-existent method or property is accessed. [...]
- toDouble() → double
inherited
- Return this num as a double. [...]
- toInt() → int
inherited
- Truncates this num to an integer and returns the result as an int.
- toStringAsExponential([int fractionDigits ]) → String
inherited
- Returns an exponential string-representation of
this. [...] - toStringAsFixed(int fractionDigits) → String
inherited
- Returns a decimal-point string-representation of
this. [...] - toStringAsPrecision(int precision) → String
inherited
- Converts
this to a double and returns a string representation with exactly precision significant digits. [...]
Operators
- operator %(num other) → double
- Euclidean modulo operator. [...]
- operator *(num other) → double
- Multiplication operator.
- operator +(num other) → double
- Addition operator.
- operator -(num other) → double
- Subtraction operator.
- operator /(num other) → double
- Division operator.
- operator unary-() → double
- Negate operator.
- operator ~/(num other) → int
- Truncating division operator. [...]
- operator <(num other) → bool
inherited
- Relational less than operator.
- operator <=(num other) → bool
inherited
- Relational less than or equal operator.
- operator ==(dynamic other) → bool
inherited
- The equality operator. [...]
- operator >(num other) → bool
inherited
- Relational greater than operator.
- operator >=(num other) → bool
inherited
- Relational greater than or equal operator.
Static Methods
- parse(String source, [ double onError(String source) ]) → double
- Parse
source as an double literal and return its value. [...] - tryParse(String source) → double
- Parse
source as an double literal and return its value. [...]
Constants
- infinity → const double
-
1.0 / 0.0
- maxFinite → const double
-
1.7976931348623157e+308
- minPositive → const double
-
5e-324
- nan → const double
-
0.0 / 0.0
- negativeInfinity → const double
-
-infinity