int class Null safety

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 values 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.

See also:

Inheritance
Available Extensions

Constructors

int.fromEnvironment(String name, {int defaultValue = 0})
Returns the integer value of the given environment declaration name.
const
factory

Properties

bitLength → int
Returns the minimum number of bits required to store this integer.
read-only
hashCode → int
Returns a hash code for a numerical value.
read-onlyinherited
isEven → bool
Returns true if and only if this integer is even.
read-only
isFinite → bool
Whether this number is finite.
read-onlyinherited
isInfinite → bool
Whether this number is positive infinity or negative infinity.
read-onlyinherited
isNaN → bool
Whether this number is a Not-a-Number value.
read-onlyinherited
isNegative → bool
Whether this number is negative.
read-onlyinherited
isOdd → bool
Returns true if and only if this integer is odd.
read-only
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
sign → int
Returns the sign of this integer.
read-onlyoverride

Methods

abs() → int
Returns the absolute value of this integer.
override
ceil() → int
Returns this.
override
ceilToDouble() → 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
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 modulo modulus.
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 this by other.
inherited
round() → int
Returns this.
override
roundToDouble() → double
Returns this.toDouble().
override
toDouble() → double
This number as a double.
inherited
toInt() → int
Truncates this num to an integer and returns the result as an int.
inherited
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.
override
toStringAsExponential([int? fractionDigits]) → String
An exponential string-representation of this number.
inherited
toStringAsFixed(int fractionDigits) → String
A decimal-point string-representation of this number.
inherited
toStringAsPrecision(int precision) → String
A string representation with precision significant digits.
inherited
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.
override
truncateToDouble() → double
Returns this.toDouble().
override

Operators

operator %(num other) → num
Euclidean modulo of this number by other.
inherited
operator &(int other) → int
Bit-wise and operator.
operator *(num other) → num
Multiplies this number by other.
inherited
operator +(num other) → num
Adds other to this number.
inherited
operator -(num other) → num
Subtracts other from this number.
inherited
operator /(num other) → double
Divides this number by other.
inherited
operator <(num other) → bool
Whether this number is numerically smaller than other.
inherited
operator <<(int shiftAmount) → int
Shift the bits of this integer to the left by shiftAmount.
operator <=(num other) → bool
Whether this number is numerically smaller than or equal to other.
inherited
operator ==(Object other) → bool
Test whether this value is numerically equal to other.
inherited
operator >(num other) → bool
Whether this number is numerically greater than other.
inherited
operator >=(num other) → bool
Whether this number is numerically greater than or equal to other.
inherited
operator >>(int shiftAmount) → int
Shift the bits of this integer to the right by shiftAmount.
operator >>>(int shiftAmount) → int
Bitwise unsigned right shift by shiftAmount bits.
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) → int
Truncating division operator.
inherited

Static Methods

parse(String source, {int? radix, int onError(String source)?}) → int
Parse source as a, possibly signed, integer literal and return its value.
override
tryParse(String source, {int? radix}) → int?
Parse source as a, possibly signed, integer literal.
override