double class - dart:core library (original) (raw)

A double-precision floating point number.

Representation of Dart doubles containing double specific constants and operations and specializations of operations inherited fromnum. Dart doubles are 64-bit floating-point numbers as specified in the IEEE 754 standard.

The double type is contagious. Operations on doubles returndouble 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 inA tour of the Dart language.

Inheritance

• Object
• num
• double

Available extensions

• DoubleAddress
• DoubleToJSNumber
• NumToJSExtension

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 this by other.

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 precision significant 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 other to this number.

override

operator -(num other)→ double

Subtracts other from 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

The negation of this value.

override

operator ~/(num other)→ int

Truncating division operator.

override

Static Methods

parse(String source)→ double

Parse source as a double literal and return its value.

override

tryParse(String source)→ double?

Parse source as a double literal and return its value.

override

Constants

infinity → const double

maxFinite → const double

minPositive → const double

nan → const double

negativeInfinity → const double