protocol SignedNumber Instances of conforming types can be subtracted, arithmetically negated, and initialized from 0. Axioms: x - 0 == x -x == 0 - x -(-x) == x Inheritance Comparable, Equatable, ExpressibleByIntegerLiteral View Protocol Hierarchy → Associated Types IntegerLiteralType A type that represents an integer literal. The standard library integer and floating-point types are all valid types for IntegerLiteralType. Import import Swift Initializers init(integerLiteral:) Creates an instance initialized to the specified integer value. Do not call this initializer directly. Instead, initialize a variable or constant using an integer literal. For example: let x = 23 In this example, the assignment to the x constant calls this integer literal initializer behind the scenes. value: The value to create. Declaration init(integerLiteral value: Self.IntegerLiteralType) Declared In ExpressibleByIntegerLiteral Instance Methods func <(_:rhs:) Required Returns a Boolean value indicating whether the value of the first argument is less than that of the second argument. This function is the only requirement of the Comparable protocol. The remainder of the relational operator functions are implemented by the standard library for any type that conforms to Comparable. Parameters: lhs: A value to compare. rhs: Another value to compare. Declaration func <(lhs: Self, rhs: Self) -> Bool Declared In Comparable func <=(_:rhs:) Returns a Boolean value indicating whether the value of the first argument is less than or equal to that of the second argument. Parameters: lhs: A value to compare. rhs: Another value to compare. Declaration func <=(lhs: Self, rhs: Self) -> Bool Declared In Comparable func ==(_:rhs:) Required Returns a Boolean value indicating whether two values are equal. Equality is the inverse of inequality. For any values a and b, a == b implies that a != b is false. Parameters: lhs: A value to compare. rhs: Another value to compare. Declaration func ==(lhs: Self, rhs: Self) -> Bool Declared In Equatable func >(_:rhs:) Returns a Boolean value indicating whether the value of the first argument is greater than that of the second argument. Parameters: lhs: A value to compare. rhs: Another value to compare. Declaration func >(lhs: Self, rhs: Self) -> Bool Declared In Comparable func >=(_:rhs:) Returns a Boolean value indicating whether the value of the first argument is greater than or equal to that of the second argument. Parameters: lhs: A value to compare. rhs: Another value to compare. Declaration func >=(lhs: Self, rhs: Self) -> Bool Declared In Comparable prefix func -(_:) Required Returns the result of negating x. Declaration prefix func -(x: Self) -> Self func -(_:rhs:) Required Returns the difference between lhs and rhs. Declaration func -(lhs: Self, rhs: Self) -> Self Default Implementations init(integerLiteral:) Create an instance initialized to value. Declaration init(integerLiteral value: Self) Declared In ExpressibleByIntegerLiteral