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
