double class Null safety

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.

See also:

Inheritance

Constructors

double()

Properties

hashCode int
Returns a hash code for a numerical value.
read-only, inherited
isFinite bool
Whether this number is finite.
read-only, inherited
isInfinite bool
Whether this number is positive infinity or negative infinity.
read-only, inherited
isNaN bool
Whether this number is a Not-a-Number value.
read-only, inherited
isNegative bool
Whether this number is negative.
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
sign double
The sign of the double's numerical value.
read-only, override

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 non-existent 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 onError(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
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