Swift Types & FunctionsLesson 21Free preview

Swift Functions

This lesson is part of Swift · All levels

Summary

This lesson reviews functions in Swift that are declared using the keyword 'func'. Swift has a very expressive parameter feature, where each parameter can have an external label argument and an internal name parameter. The developer will also study the value of the compound return using tuple, default parameters, and in-out parameters.

Key points

Function is declared with 'func namaFungsi(param: Tipe) -> TypeReturn'
Supports external label arguments to clarify natural English-like pronunciation
Use '_' in front of the parameter name to ignore the label argument when calling
The keyword 'inout' allows modification of the value of the original variable from within the function (pass by reference)

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