Shulou(Shulou.com)06/02 Report--

This article shows you what the basic grammar of Swift is. It is concise and easy to understand. It will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Swift is a new programming language developed for IOS and OS X app. Therefore, if you have the experience of developing Swift C, you will be familiar with many parts of it.

Swift provides its own version of all types in the underlying C language and Objective-C, including Int types for integers; double precision (Double) and floating point types (Float) for floating-point numbers; Bool types for Boolean values; and String types for text data. Swift also provides powerful versions of two basic collection types: Array and Ditionary, which are described in detail in the Collection Types chapter.

Just like C, Swift uses variables (through an identity name) to store and reference values. Swift also creates extensive variables that use values that cannot be changed. This is what we already know as constants, and constants in Swift are much more powerful than constants in C. The use of constants throughout the Swift is designed to make the code more secure and concise when using values that do not need to be changed.

In addition to familiar types, Swift introduces advanced types that are not available in Objective-C. This includes tuples, which allow you to create and pass a set of values. With tuples, you can return multiple values (as a compound value) in a function.

Swift also introduces optional types that deal with missing values, which means either "there is a value and it equals x'" or "no value at all". Optionally similar to nil when pointers are used in Objective-C, but they work on any type, not just classes. Optional is more secure and reliable than the nil pointer in Objectiv-C and is at the heart of many powerful features of Swift.

The use of optional types shows that Swift is a type-safe language. Swift helps you know exactly what type of value you are using in your code. If you need a string in your code, type safety prevents you from passing an incorrect integer to it. This allows you to find and correct errors as early as possible in the development process.

The above content is what is the basic grammar of Swift. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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