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
.
Constructors
- int.fromEnvironment(String name, { int defaultValue })
-
Returns the integer value of the given environment declaration
name
. [...]constfactory
Properties
- bitLength → int
-
Returns the minimum number of bits required to store this integer. [...]
read-only
- isEven → bool
-
Returns true if and only if this integer is even.
read-only
- isOdd → bool
-
Returns true if and only if this integer is odd.
read-only
- sign → int
-
Returns the sign of this integer. [...]
read-only, override
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- isFinite → bool
-
True if the number is finite; otherwise, false. [...]
read-only, inherited
- isInfinite → bool
-
True if the number is positive infinity or negative infinity; otherwise,
false.
read-only, inherited
- isNaN → bool
-
True if the number is the double Not-a-Number value; otherwise, false.
read-only, inherited
- isNegative → bool
-
True if the number is negative; otherwise, false. [...]
read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
abs(
) → int -
Returns the absolute value of this integer. [...]
override
-
ceil(
) → int -
Returns
this
.override -
ceilToDouble(
) → double -
Returns
this.toDouble()
.override -
floor(
) → int -
Returns
this
.override -
floorToDouble(
) → double -
Returns
this.toDouble()
.override -
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
modulomodulus
. [...] -
round(
) → int -
Returns
this
.override -
roundToDouble(
) → double -
Returns
this.toDouble()
.override -
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 inwidth
bits using an signed 2-s complement representation. The returned value has the same bit value in all positions higher thanwidth
. [...] -
toString(
) → String -
Returns a String-representation of this integer. [...]
override
-
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 thanwidth
. [...] -
truncate(
) → int -
Returns
this
.override -
truncateToDouble(
) → double -
Returns
this.toDouble()
.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 -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
inherited
-
remainder(
num other) → num -
Returns the remainder of the truncating division of
this
byother
. [...]inherited -
toDouble(
) → double -
Return this num as a double. [...]
inherited
-
toInt(
) → int -
Truncates this num to an integer and returns the result as an int.
inherited
-
toStringAsExponential(
[int fractionDigits ]) → String -
Returns an exponential string-representation of
this
. [...]inherited -
toStringAsFixed(
int fractionDigits) → String -
Returns a decimal-point string-representation of
this
. [...]inherited -
toStringAsPrecision(
int precision) → String -
Converts
this
to a double and returns a string representation with exactlyprecision
significant digits. [...]inherited
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. [...]
override
-
operator |(
int other) → int - Bit-wise or operator. [...]
-
operator ~(
) → int - The bit-wise negate operator. [...]
-
operator %(
num other) → num -
Euclidean modulo operator. [...]
inherited
-
operator *(
num other) → num -
Multiplication operator.
inherited
-
operator +(
num other) → num -
Addition operator.
inherited
-
operator -(
num other) → num -
Subtraction operator.
inherited
-
operator /(
num other) → double -
Division operator.
inherited
-
operator <(
num other) → bool -
Relational less than operator.
inherited
-
operator <=(
num other) → bool -
Relational less than or equal operator.
inherited
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited
-
operator >(
num other) → bool -
Relational greater than operator.
inherited
-
operator >=(
num other) → bool -
Relational greater than or equal operator.
inherited
-
operator ~/(
num other) → int -
Truncating division operator. [...]
inherited