Judgment of data types in Go language

To determine the data types in the Go language, this article describes three ways.
Method One: Use I. (type) combined with NULL interface (interface{})

func main() {    v1 := "中国你好"    v2 := 20    var v3 byte = 65    fmt.Printf("v1的数据类型为：%s\n", checkType(v1))    fmt.Printf("v2的数据类型为：%s\n", checkType(v2))    fmt.Printf("v3的数据类型为：%s\n", checkType(v3))}func checkType(i interface{}) string{    switch  i.(type) {    case string :        return "string"    case int :        return "int"    case byte :        return "byte"    }    return ""}

Output:

v1的数据类型为：stringv2的数据类型为：intv3的数据类型为：byte

Note: I. (type) can only be used in switch

Method Two: Use formatted output%t in FMT

func main() {    v1 := "中国你好"    v2 := 20    var v3 byte = 65    fmt.Printf("v1的数据类型为：%T\n", v1)    fmt.Printf("v2的数据类型为：%T\n", v2)    fmt.Printf("v2的数据类型为：%T\n", v3)}

Output:

v1的数据类型为：stringv2的数据类型为：intv2的数据类型为：uint8

Description: Byte is the same type as Uint8

Method Three: Use the TypeOf function in reflect reflection

func main() {    v1 := "中国你好"    v2 := 20    var v3 byte = 65    fmt.Printf("v1的数据类型为：%v\n", reflect.TypeOf(v1))    fmt.Printf("v2的数据类型为：%v\n", reflect.TypeOf(v2))    fmt.Printf("v3的数据类型为：%v\n", reflect.TypeOf(v3))}

Output:

v1的数据类型为：stringv2的数据类型为：intv2的数据类型为：uint8

Judgment of data types in Go language