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.
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
sourceas 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
thisbyother. - 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 - 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
thisto a double and returns a string representation with exactlyprecisionsignificant digits.
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-core/double-class.html