num class - dart:core library (original) (raw)

An integer or floating-point number.

It is a compile-time error for any type other than int or doubleto attempt to extend or implement num.

See also:

• int: An integer number.
• double: A double-precision floating point number.
• Numbers inA tour of the Dart language.

Implemented types

• Comparable<num>

Implementers

• double
• int

Available extensions

• NumToJSExtension

Properties

hashCode → int

Returns a hash code for a numerical value.

no setteroverride

isFinite → bool

Whether this number is finite.

no setter

isInfinite → bool

Whether this number is positive infinity or negative infinity.

no setter

isNaN → bool

Whether this number is a Not-a-Number value.

no setter

isNegative → bool

Whether this number is negative.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setterinherited

sign → num

Negative one, zero or positive one depending on the sign and numerical value of this number.

no setter

toJS → JSNumber

Available on num, provided by the NumToJSExtension extension

Converts this num to a JSNumber.

no setter

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 nonexistent method or property is accessed.

inherited

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

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 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

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.

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.