dart:core
int class
An integer number.
The default implementation of int is 64-bit two's complement integers with operations that wrap to that range on overflow.
Note: When compiling to JavaScript, integers are restricted to valus that can be represented exactly by double-precision floating point values. The available integer values include all integers between -2^53 and 2^53, and some integers with larger magnitude. That includes some integers larger than 2^63. The behavior of the operators and methods in the int class therefore sometimes differs between the Dart VM and Dart code compiled to JavaScript. For example, the bitwise operators truncate their operands to 32-bit integers when compiled to JavaScript.
Classes cannot extend, implement, or mix in int.
- Inheritance
Constructors
- int.fromEnvironment(String name, { int defaultValue })
const
factory
- Returns the integer value of the given environment declaration
name. [...]
Properties
- bitLength → int
read-only
- Returns the minimum number of bits required to store this integer. [...]
- isEven → bool
read-only
- Returns true if and only if this integer is even.
- isOdd → bool
read-only
- Returns true if and only if this integer is odd.
- sign → int
read-only
- Returns the sign of this integer. [...]
- hashCode → int
read-only, inherited
- The hash code for this object. [...]
- isFinite → bool
read-only, inherited
- True if the number is finite; otherwise, false. [...]
- isInfinite → bool
read-only, inherited
- True if the number is positive infinity or negative infinity; otherwise, false.
- isNaN → bool
read-only, inherited
- True if the number is the double Not-a-Number value; otherwise, false.
- isNegative → bool
read-only, inherited
- True if the number is negative; otherwise, false. [...]
- runtimeType → Type
read-only, inherited
- A representation of the runtime type of the object.
Methods
- abs() → int
- Returns the absolute value of this integer. [...]
- ceil() → int
- Returns
this. - ceilToDouble() → double
- Returns
this.toDouble(). - floor() → int
- Returns
this. - floorToDouble() → double
- Returns
this.toDouble(). - gcd(int other) → int
- Returns the greatest common divisor of this integer and
other. [...] - modInverse(int modulus) → int
- Returns the modular multiplicative inverse of this integer modulo
modulus. [...] - modPow(int exponent, int modulus) → int
- Returns this integer to the power of
exponent modulo modulus. [...] - round() → int
- Returns
this. - roundToDouble() → double
- Returns
this.toDouble(). - toRadixString(int radix) → String
- Converts this to a string representation in the given
radix. [...] - toSigned(int width) → int
- Returns the least significant
width bits of this integer, extending the highest retained bit to the sign. This is the same as truncating the value to fit in width bits using an signed 2-s complement representation. The returned value has the same bit value in all positions higher than width. [...] - toString() → String
- Returns a String-representation of this integer. [...]
- toUnsigned(int width) → int
- Returns the least significant
width bits of this integer as a non-negative number (i.e. unsigned representation). The returned value has zeros in all bit positions higher than width. [...] - truncate() → int
- Returns
this. - truncateToDouble() → double
- Returns
this.toDouble(). - clamp(num lowerLimit, num upperLimit) → num
inherited
- Returns this num clamped to be in the range
lowerLimit-upperLimit. [...] - compareTo(num other) → int
inherited
- Compares this to
other. [...] - noSuchMethod(Invocation invocation) → dynamic
inherited
- Invoked when a non-existent method or property is accessed. [...]
- remainder(num other) → num
inherited
- Returns the remainder of the truncating division of
this by other. [...] - toDouble() → double
inherited
- Return this num as a double. [...]
- toInt() → int
inherited
- Truncates this num to an integer and returns the result as an int.
- toStringAsExponential([int fractionDigits ]) → String
inherited
- Returns an exponential string-representation of
this. [...] - toStringAsFixed(int fractionDigits) → String
inherited
- Returns a decimal-point string-representation of
this. [...] - toStringAsPrecision(int precision) → String
inherited
- Converts
this to a double and returns a string representation with exactly precision significant digits. [...]
Operators
- operator &(int other) → int
- Bit-wise and operator. [...]
- operator <<(int shiftAmount) → int
- Shift the bits of this integer to the left by
shiftAmount. [...] - operator >>(int shiftAmount) → int
- Shift the bits of this integer to the right by
shiftAmount. [...] - operator ^(int other) → int
- Bit-wise exclusive-or operator. [...]
- operator unary-() → int
- Return the negative value of this integer. [...]
- operator |(int other) → int
- Bit-wise or operator. [...]
- operator ~() → int
- The bit-wise negate operator. [...]
- operator %(num other) → num
inherited
- Euclidean modulo operator. [...]
- operator *(num other) → num
inherited
- Multiplication operator.
- operator +(num other) → num
inherited
- Addition operator.
- operator -(num other) → num
inherited
- Subtraction operator.
- operator /(num other) → double
inherited
- Division operator.
- operator <(num other) → bool
inherited
- Relational less than operator.
- operator <=(num other) → bool
inherited
- Relational less than or equal operator.
- operator ==(dynamic other) → bool
inherited
- The equality operator. [...]
- operator >(num other) → bool
inherited
- Relational greater than operator.
- operator >=(num other) → bool
inherited
- Relational greater than or equal operator.
- operator ~/(num other) → int
inherited
- Truncating division operator. [...]
Static Methods
- parse(String source, { int radix, int onError(String source) }) → int
- Parse
source as a, possibly signed, integer literal and return its value. [...] - tryParse(String source, { int radix }) → int
- Parse
source as a, possibly signed, integer literal and return its value. [...]