Swift#4 Functions

Swift Functions are First class type.

• You can assign functions to variables
• You can pass them as parameters
• You can make them as return types.

You can also add function inside a function.

Swift#3 Enumeration

• Enumeration(Enums) in swift are much more powerful than Objective C.
• Unlike Obj C, Swift enums can assign strings, characters or floats as values for each member besides integers.
• The Convenient toRaw() method returns the values assigned to each member.
• Enums can also be parameterized (give or assign values to it.)
• Swift structs can have method and are passed by value.

Swift#2 Tuples

• Group multiple values into a single compound value.
• Values can be any type and they do not have to be same type.
• Extremely convenient as return types for functions that needs to return more than one value.