In-depth understanding of different data types in Go language
To understand the different data types in Go language, you need specific code examples
As a statically typed programming language, Go language has rich data types, including basic Data types and composite data types. Mastering the characteristics and usage of different data types is crucial to writing efficient and accurate programs. The following will introduce several common data types in Go language with specific code examples.
- Basic data types:
Go language provides some basic data types, including integer, floating point, Boolean and string types.
Integer type:
package main import "fmt" func main() { var a int = 10 fmt.Printf("整型变量a的值为:%d ", a) // 其他整型类型 var b int8 = 127 var c int16 = 32767 var d int32 = 2147483647 var e int64 = 9223372036854775807 fmt.Printf("整型变量b的值为:%d ", b) fmt.Printf("整型变量c的值为:%d ", c) fmt.Printf("整型变量d的值为:%d ", d) fmt.Printf("整型变量e的值为:%d ", e) }
Floating point type:
package main import "fmt" func main() { var f1 float32 = 3.14159 var f2 float64 = 3.1415926535897932384626433 fmt.Printf("浮点型变量f1的值为:%f ", f1) fmt.Printf("浮点型变量f2的值为:%f ", f2) }
Boolean type:
package main import "fmt" func main() { var b1 bool = true var b2 bool = false fmt.Printf("布尔型变量b1的值为:%t ", b1) fmt.Printf("布尔型变量b2的值为:%t ", b2) }
String type:
package main import "fmt" func main() { var str1 string = "Hello, Go" str2 := "Hello, 世界" fmt.Printf("字符串str1的值为:%s ", str1) fmt.Printf("字符串str2的值为:%s ", str2) }
- Composite data types
In addition to basic data types, the Go language also provides some composite data types, including arrays, slices, dictionaries, and structures.
Array:
package main import "fmt" func main() { var arr [5]int arr[0] = 10 arr[1] = 20 arr[2] = 30 arr[3] = 40 arr[4] = 50 fmt.Println("数组arr的值为:", arr) }
Slice:
package main import "fmt" func main() { var slice []int slice = make([]int, 5) slice[0] = 10 slice[1] = 20 slice[2] = 30 slice[3] = 40 slice[4] = 50 fmt.Println("切片slice的值为:", slice) }
Dictionary:
package main import "fmt" func main() { var dict map[string]int dict = make(map[string]int) dict["a"] = 10 dict["b"] = 20 dict["c"] = 30 fmt.Println("字典dict的值为:", dict) }
Structure:
package main import "fmt" type Person struct { Name string Age int } func main() { var p1 Person p1.Name = "Tom" p1.Age = 18 fmt.Printf("结构体p1的值为:%v ", p1) }
These code examples cover Learn about several common data types in Go language and how to use them. By understanding and mastering these data types, I believe readers can write Go programs more effectively. Of course, the Go language also provides other rich data types, and readers can consult relevant materials for in-depth study.
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