num abstract class
An integer or floating-point number.
It is a compile-time error for any type other than int or double to attempt to extend or implement num.
- Implements
- Implemented by
Static Methods
- parse(
String input, [ num onError(String input) ]) → num -
Parses a string containing a number literal into a number.
Constructors
- num()
Properties
- hashCode → int read-only
-
Returns a hash code for a numerical value.
- isFinite → bool read-only
-
True if the number is finite; otherwise, false.
- isInfinite → bool read-only
-
True if the number is positive infinity or negative infinity; otherwise, false.
- isNaN → bool read-only
-
True if the number is the double Not-a-Number value; otherwise, false.
- isNegative → bool read-only
-
True if the number is negative; otherwise, false.
- sign → num read-only
-
Returns minus one, zero or plus one depending on the sign and numerical value of the number.
- runtimeType → Type read-only, inherited
-
A representation of the runtime type of the object.
Operators
- operator %(
num other) → num -
Euclidean modulo operator.
- operator *(
num other) → num -
Multiplication operator.
- operator +(
num other) → num -
Addition operator.
- operator -(
num other) → num -
Subtraction operator.
- operator /(
num other) → double -
Division operator.
- operator <(
num other) → bool -
Relational less than operator.
- operator <=(
num other) → bool -
Relational less than or equal operator.
- operator ==(
Object other) → bool -
Test whether this value is numerically equal to
other. - operator >(
num other) → bool -
Relational greater than operator.
- operator >=(
num other) → bool -
Relational greater than or equal operator.
- operator unary-(
) → num -
Negate operator.
- operator ~/(
num other) → int -
Truncating division operator.
Methods
- abs(
) → num -
Returns the absolute value of this num.
- ceil(
) → int -
Returns the least integer no smaller than
this. - ceilToDouble(
) → double -
Returns the least double integer value no smaller than
this. - clamp(
num lowerLimit, num upperLimit) → num -
Returns this num clamped to be in the range
lowerLimit-upperLimit. - compareTo(
num other) → int -
Compares this to
other. - floor(
) → int -
Returns the greatest integer no greater than
this. - floorToDouble(
) → double -
Returns the greatest double integer value no greater than
this. - remainder(
num other) → num -
Returns the remainder of the truncating division of
thisbyother. - round(
) → int -
Returns the integer closest to
this. - roundToDouble(
) → double -
Returns the double integer value closest to
this. - toDouble(
) → double - toInt(
) → int -
Truncates this num to an integer and returns the result as an int.
- toString(
) → String -
Returns the shortest string that correctly represent the input number.
- toStringAsExponential(
[int fractionDigits ]) → String -
Returns an exponential string-representation of
this. - toStringAsFixed(
int fractionDigits) → String -
Returns a decimal-point string-representation of
this. - toStringAsPrecision(
int precision) → String -
Converts
thisto a double and returns a string representation with exactlyprecisionsignificant digits. - truncate(
) → int -
Returns the integer obtained by discarding any fractional digits from
this. - truncateToDouble(
) → double -
Returns the double integer value obtained by discarding any fractional digits from the double value of
this. - noSuchMethod(
Invocation invocation) → dynamic inherited -
Invoked when a non-existent method or property is accessed.
© 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/num-class.html