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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

signdouble
read-only, override
Returns the sign of the double's numerical value. [...]
hashCodeint
read-only, inherited
The hash code for this object. [...]
isFinitebool
read-only, inherited
True if the number is finite; otherwise, false. [...]
isInfinitebool
read-only, inherited
True if the number is positive infinity or negative infinity; otherwise, false.
isNaNbool
read-only, inherited
True if the number is the double Not-a-Number value; otherwise, false.
isNegativebool
read-only, inherited
True if the number is negative; otherwise, false. [...]
runtimeTypeType
read-only, inherited
A representation of the runtime type of the object.

Methods

abs() → double
override
Returns the absolute value of this double.
ceil() → int
override
Returns the least integer no smaller than this. [...]
ceilToDouble() → double
override
Returns the least integer double value no smaller than this. [...]
floor() → int
override
Returns the greatest integer no greater than this. [...]
floorToDouble() → double
override
Returns the greatest integer double value no greater than this. [...]
remainder(num other) → double
override
Returns the remainder of the truncating division of this by other. [...]
round() → int
override
Returns the integer closest to this. [...]
roundToDouble() → double
override
Returns the integer double value closest to this. [...]
toString() → String
override
Provide a representation of this double value. [...]
truncate() → int
override
Returns the integer obtained by discarding any fractional digits from this. [...]
truncateToDouble() → double
override
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
override
Euclidean modulo operator. [...]
operator *(num other) → double
override
Multiplication operator.
operator +(num other) → double
override
Addition operator.
operator -(num other) → double
override
Subtraction operator.
operator /(num other) → double
override
Division operator.
operator unary-() → double
override
Negate operator.
operator ~/(num other) → int
override
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
override
Parse source as an double literal and return its value. [...]
tryParse(String source) → double
override
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

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-core/double-class.html