num class Null safety
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.
See also:
- int: An integer number.
- double: A double-precision floating point number.
- Numbers in A tour of the Dart language.
- Implemented types
- Implementers
Constructors
- num()
Properties
- hashCode → int
-
Returns a hash code for a numerical value.
read-only, override
- isFinite → bool
-
Whether this number is finite.
read-only
- isInfinite → bool
-
Whether this number is positive infinity or negative infinity.
read-only
- isNaN → bool
-
Whether this number is a Not-a-Number value.
read-only
- isNegative → bool
-
Whether this number is negative.
read-only
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
- sign → num
-
Negative one, zero or positive one depending on the sign and
numerical value of this number.
read-only
Methods
-
abs(
) → num - The absolute value of this number.
-
ceil(
) → int -
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.override -
floor(
) → int - The greatest integer no greater than this number.
-
floorToDouble(
) → double -
Returns the greatest double integer value no greater than
this. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
remainder(
num other) → num -
The remainder of the truncating division of
thisbyother. -
round(
) → int - The integer closest to this number.
-
roundToDouble(
) → double - The double integer value closest to this value.
-
toDouble(
) → double - This number as a double.
-
toInt(
) → int - Truncates this num to an integer and returns the result as an int.
-
toString(
) → String -
The shortest string that correctly represents this number.
override
-
toStringAsExponential(
[int? fractionDigits]) → String - An exponential string-representation of this number.
-
toStringAsFixed(
int fractionDigits) → String - A decimal-point string-representation of this number.
-
toStringAsPrecision(
int precision) → String -
A string representation with
precisionsignificant digits. -
truncate(
) → int -
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.
Operators
-
operator %(
num other) → num -
Euclidean modulo of this number by
other. -
operator *(
num other) → num -
Multiplies this number by
other. -
operator +(
num other) → num -
Adds
otherto this number. -
operator -(
num other) → num -
Subtracts
otherfrom this number. -
operator /(
num other) → double -
Divides this number by
other. -
operator <(
num other) → bool -
Whether this number is numerically smaller than
other. -
operator <=(
num other) → bool -
Whether this number is numerically smaller than or equal to
other. -
operator ==(
Object other) → bool -
Test whether this value is numerically equal to
other.override -
operator >(
num other) → bool -
Whether this number is numerically greater than
other. -
operator >=(
num other) → bool -
Whether this number is numerically greater than or equal to
other. -
operator unary-(
) → num - The negation of this value.
-
operator ~/(
num other) → int - Truncating division operator.