Learn Swift Programming Syntax Swift BasicsGet familiar with Swift types and operators, and develop deftness in defining variables and constants.OptionalsThe optional type is specific to Swift: declare explicitly and implicitly unwrapped optionals; unwrap optionals using optional binding and optional chaining.CollectionsLearn about Dictionaries, Arrays, and Sets and perform basic operations including: append, count, insert, remove, update, find, and retrieve.Control FlowPractice fast iteration with for-in loops by iterating through items in Arrays and Dictionaries, also learn how Swift handles if-else and switch statements.FunctionsDefine and call functions, correctly using local and external parameters; identify parameter types and return types.Classes, Properties, and MethodsPractice building custom classes with their own properties and methods.Enums and StructsLearn the difference between value types and references types and practice choosing when to use enums, structs, and classes.Protocols and ExtensionsLearn how protocols and extensions help keep your code DRY. Given code snippets, fix compiler errors by conforming to and implementing appropriate protocols.Closure ExpressionsPractice using Swift closures with the functions, sorted() and filter(). You'll also learn shorthand to make your closure expressions super concise.CompanyAbout UsWhy Udacity?BlogIn the NewsJobs at UdacityBecome a MentorPartner with UdacityResourcesCatalogCareer OutcomesHelp and FAQScholarshipsResource CenterFeatured ProgramsBusiness AnalyticsSQLAWS Cloud ArchitectData AnalystIntro to ProgrammingDigital MarketingSelf Driving Car EngineerOnly at UdacityArtificial IntelligenceDeep LearningDigital MarketingFlying Car and Autonomous Flight EngineerIntro to Self-Driving CarsMachine Learning EngineerRobotics Software EngineerAI Master’sMaster of Business AdministrationMaster of Science in AIUdacity SchoolsSchool of Animation and Game DevelopmentSchool of Artificial IntelligenceSchool of Autonomous SystemsSchool of BusinessCareer ResourcesSchool of Cloud ComputingSchool of CybersecuritySchool of Data ScienceSchool of DevOpsSchool of Executive LeadershipSchool of Product ManagementSchool of Programming and Development