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In-depth understanding of the data type characteristics of Go language requires specific code examples
Go language is a modern programming language that combines the advantages of many traditional programming languages. , and added some new features. In the Go language, data type is a very important concept, which determines the type and range of data we can store and process. This article will provide an in-depth introduction to the characteristics of common data types in the Go language and provide specific code examples to help readers better understand.
1. Basic data types
Go language provides some basic data types, including integers (int), floating point numbers (float), Boolean values (bool) and characters (rune). These data types have the following characteristics:
var num1 int8 = 127 var num2 uint16 = 65535 fmt.Println(num1, num2)
var f1 float32 = 3.14 var f2 float64 = 3.141592653589793238462643383279502884197169399375105820974944 fmt.Println(f1, f2)
var b1 bool = true var b2 bool = false fmt.Println(b1, b2)
var c1 rune = 'A' var c2 rune = '爱' fmt.Println(c1, c2)
2. Composite data types
In addition to basic data types, Go language also provides some composite data types, including arrays, slices, and maps , structures and interfaces. These data types have the following characteristics:
var arr1 [3]int = [3]int{1, 2, 3} var arr2 [5]string = [5]string{"apple", "banana", "cherry", "date", "elderberry"} fmt.Println(arr1, arr2)
var slice1 []int = []int{1, 2, 3, 4, 5} fmt.Println(slice1)
var m1 map[string]int = map[string]int{"apple": 1, "banana": 2, "cherry": 3} fmt.Println(m1)
type Person struct { Name string Age int } var p1 Person = Person{Name: "Alice", Age: 20} fmt.Println(p1)
type Animal interface { Eat() Sleep() } type Cat struct { Name string } func (c Cat) Eat() { fmt.Println(c.Name, "eat fish") } func (c Cat) Sleep() { fmt.Println(c.Name, "sleep on the roof") } var a Animal = Cat{Name: "Tom"} a.Eat() a.Sleep()
This article introduces the characteristics of common data types in the Go language and provides specific code examples to help readers better understand. For beginners, familiarity with the characteristics of these data types is crucial to writing correct and efficient programs. Through continuous practice and practice, readers can have a deeper understanding of the data types of the Go language and flexibly apply them to their own projects.
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