description

# double class Null safety

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
  - Object
  - num
  - double

## Constructors

double()

## Properties

hashCode → int
  The hash code for this object. [...]
  read-only, inherited
isFinite → bool
  True if the number is finite; otherwise, false. [...]
  read-only, inherited
isInfinite → bool
  True if the number is positive infinity or negative infinity; otherwise, false.
  read-only, inherited
isNaN → bool
  True if the number is the double Not-a-Number value; otherwise, false.
  read-only, inherited
isNegative → bool
  True if the number is negative; otherwise, false. [...]
  read-only, inherited
runtimeType → Type
  A representation of the runtime type of the object.
  read-only, inherited
sign → double
  Returns the sign of the double's numerical value. [...]
  read-only, override

## Methods

abs() → double
  Returns the absolute value of this double.
  override
ceil() → int
  Returns the least integer no smaller than `this`. [...]
  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`. [...]
  override
floorToDouble() → double
  Returns the greatest integer double value no greater than `this`. [...]
  override
noSuchMethod(Invocation invocation) → dynamic
  Invoked when a non-existent method or property is accessed. [...]
  inherited
remainder(num other) → double
  Returns the remainder of the truncating division of `this` by `other`. [...]
  override
round() → int
  Returns the integer closest to `this`. [...]
  override
roundToDouble() → double
  Returns the integer double value closest to `this`. [...]
  override
toDouble() → double
  Return this num 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
  Returns an exponential string-representation of `this`. [...]
  inherited
toStringAsFixed(int fractionDigits) → String
  Returns a decimal-point string-representation of `this`. [...]
  inherited
toStringAsPrecision(int precision) → String
  Converts `this` to a double and returns a string representation with exactly `precision` significant digits. [...]
  inherited
truncate() → int
  Returns the integer obtained by discarding any fractional digits from `this`. [...]
  override
truncateToDouble() → double
  Returns the integer double value obtained by discarding any fractional digits from `this`. [...]
  override

## Operators

operator %(num other) → double
  Euclidean modulo operator. [...]
  override
operator *(num other) → double
  Multiplication operator.
  override
operator +(num other) → double
  Addition operator.
  override
operator -(num other) → double
  Subtraction operator.
  override
operator /(num other) → double
  Division operator.
  override
operator <(num other) → bool
  Relational less than operator.
  inherited
operator <=(num other) → bool
  Relational less than or equal operator.
  inherited
operator ==(Object other) → bool
  The equality operator. [...]
  inherited
operator >(num other) → bool
  Relational greater than operator.
  inherited
operator >=(num other) → bool
  Relational greater than or equal operator.
  inherited
operator unary-() → double
  Negate operator.
  override
operator ~/(num other) → int
  Truncating division operator. [...]
  override

## Static Methods

parse(String source, [double onError(String source)]) → double
  Parse `source` as an double literal and return its value. [...]
  override
tryParse(String source) → double?
  Parse `source` as an double literal and return its value. [...]
  override

## 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`