dart:core
num 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.
See also:
- Implemented types
-
- Implementers
Constructors
- num()
Properties
- hashCode → int
read-only, override
- Returns a hash code for a numerical value.
- isFinite → bool
read-only
- Whether this number is finite.
- isInfinite → bool
read-only
- Whether this number is positive infinity or negative infinity.
- isNaN → bool
read-only
- Whether this number is a Not-a-Number value.
- isNegative → bool
read-only
- Whether this number is negative.
- runtimeType → Type
read-only, inherited
- A representation of the runtime type of the object.
- sign → num
read-only
- Negative one, zero or positive one depending on the sign and numerical value of this number.
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
override
- Compares this to
other. - 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
inherited
- Invoked when a non-existent method or property is accessed.
- remainder(num other) → num
- The remainder of the truncating division of
this by other. - 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
override
- The shortest string that correctly represents this number.
- 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
precision significant 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
other to this number. - operator -(num other) → num
- Subtracts
other from 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
override
- Test whether this value is numerically equal to
other. - 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.
Static Methods
- parse(String input, [num onError(String input)?]) → num
- Parses a string containing a number literal into a number.
- tryParse(String input) → num?
- Parses a string containing a number literal into a number.