# FixedWidthInteger Implementations ## Topics ### Operators [`static func &* (Self, Self) -> Self`](/documentation/Swift/Int64/&*(_:_:)) Returns the product of the two given values, wrapping the result in case of any overflow. [`static func &*= (inout Self, Self)`](/documentation/Swift/Int64/&*=(_:_:)) Multiplies two values and stores the result in the left-hand-side variable, wrapping any overflow. [`static func &+ (Self, Self) -> Self`](/documentation/Swift/Int64/&+(_:_:)) Returns the sum of the two given values, wrapping the result in case of any overflow. [`static func &+= (inout Self, Self)`](/documentation/Swift/Int64/&+=(_:_:)) Adds two values and stores the result in the left-hand-side variable, wrapping any overflow. [`static func &- (Self, Self) -> Self`](/documentation/Swift/Int64/&-(_:_:)) Returns the difference of the two given values, wrapping the result in case of any overflow. [`static func &-= (inout Self, Self)`](/documentation/Swift/Int64/&-=(_:_:)) Subtracts the second value from the first and stores the difference in the left-hand-side variable, wrapping any overflow. [`static func &<< (Self, Other) -> Self`](/documentation/Swift/Int64/&__(_:_:)-1vhcm) Returns the result of shifting a value’s binary representation the specified number of digits to the left, masking the shift amount to the type’s bit width. [`static func &>> (Self, Other) -> Self`](/documentation/Swift/Int64/&__(_:_:)-35gqp) Returns the result of shifting a value’s binary representation the specified number of digits to the right, masking the shift amount to the type’s bit width. [`static func &>> (Int64, Int64) -> Int64`](/documentation/Swift/Int64/&__(_:_:)-3uykh) Returns the result of shifting a value’s binary representation the specified number of digits to the right, masking the shift amount to the type’s bit width. [`static func &>> (Self, Self) -> Self`](/documentation/Swift/Int64/&__(_:_:)-5vfka) Returns the result of shifting a value’s binary representation the specified number of digits to the right, masking the shift amount to the type’s bit width. [`static func &<< (Self, Self) -> Self`](/documentation/Swift/Int64/&__(_:_:)-61wzt) Returns the result of shifting a value’s binary representation the specified number of digits to the left, masking the shift amount to the type’s bit width. [`static func &<< (Int64, Int64) -> Int64`](/documentation/Swift/Int64/&__(_:_:)-gclw) Returns the result of shifting a value’s binary representation the specified number of digits to the left, masking the shift amount to the type’s bit width. [`static func &>>= (inout Self, Other)`](/documentation/Swift/Int64/&__=(_:_:)-7fhnz) Calculates the result of shifting a value’s binary representation the specified number of digits to the right, masking the shift amount to the type’s bit width, and stores the result in the left-hand-side variable. [`static func &<<= (inout Self, Other)`](/documentation/Swift/Int64/&__=(_:_:)-o7l7) Returns the result of shifting a value’s binary representation the specified number of digits to the left, masking the shift amount to the type’s bit width, and stores the result in the left-hand-side variable. ### Initializers [`init?(String)`](/documentation/Swift/Int64/init(_:)-6esec) Creates a new integer value from the given string. [`init(T)`](/documentation/Swift/Int64/init(_:)-9oso5) [`init?(S, radix: Int)`](/documentation/Swift/Int64/init(_:radix:)) Creates a new integer value from the given string and radix. [`init(bigEndian: Self)`](/documentation/Swift/Int64/init(bigEndian:)) Creates an integer from its big-endian representation, changing the byte order if necessary. [`init?(exactly: T)`](/documentation/Swift/Int64/init(exactly:)-7ihf2) [`init(littleEndian: Self)`](/documentation/Swift/Int64/init(littleEndian:)) Creates an integer from its little-endian representation, changing the byte order if necessary. ### Instance Properties [`var bigEndian: Self`](/documentation/Swift/Int64/bigEndian) The big-endian representation of this integer. [`var littleEndian: Self`](/documentation/Swift/Int64/littleEndian) The little-endian representation of this integer. ### Type Methods [`static func random(in: Range) -> Self`](/documentation/Swift/Int64/random(in:)-4o9ko) Returns a random value within the specified range. [`static func random(in: ClosedRange) -> Self`](/documentation/Swift/Int64/random(in:)-5f9pk) Returns a random value within the specified range. [`static func random(in: ClosedRange, using: inout T) -> Self`](/documentation/Swift/Int64/random(in:using:)-1ac76) Returns a random value within the specified range, using the given generator as a source for randomness. [`static func random(in: Range, using: inout T) -> Self`](/documentation/Swift/Int64/random(in:using:)-2tzae) Returns a random value within the specified range, using the given generator as a source for randomness. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)