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:

num the super class for double.
Numbers in A tour of the Dart language.

Inheritance

Object
num
double

Available Extensions

DoubleToWasmFloat

Constructors

double()

Properties

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

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