Swift Standard Library

Overview

The Swift standard library defines a base layer of functionality for writing Swift programs, including:

• Fundamental data types such as Int, Double, and String

• Common data structures such as Array, Dictionary, and Set

• Global functions such as print(_:separator:terminator:) and abs(_:)

• Protocols, such as Collection and Equatable, that describe common abstractions.

• Protocols, such as CustomDebugStringConvertible and CustomReflectable, that you use to customize operations that are available to all types.

• Protocols, such as OptionSet, that you use to provide implementations that would otherwise require boilerplate code.

Topics

Values and Collections

• Numbers and Basic Values
• Strings and Text
• Collections
• Time

Tools for Your Types

• Basic Behaviors
• Encoding, Decoding, and Serialization
• Initialization with Literals

Programming Tasks

• Input and Output
• Debugging and Reflection
• Macros
• Concurrency
• Key-Path Expressions
• Manual Memory Management
• Type Casting and Existential Types
• C Interoperability
• Operator Declarations

Deprecated

• Deprecated

See Also

Standard Library

• Int
• Double
• String
• Array
• Dictionary