dart:core

double abstract 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

• Object
• num
• double

Constants

INFINITY → double

1.0 / 0.0

MAX_FINITE → double

1.7976931348623157e+308

MIN_POSITIVE → double

5e-324

NAN → double

0.0 / 0.0

NEGATIVE_INFINITY → double

-INFINITY

Static Methods

parse(String source, [ double onError(String source) ]) → double

Parse source as an double literal and return its value.

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.

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 ==(Object other) → bool

inherited

Test whether this value is numerically equal to other.

operator >(num other) → bool

inherited

Relational greater than operator.

operator >=(num other) → bool

inherited

Relational greater than or equal operator.

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.