reflect.FieldByIndex() Function in Golang with Examples Last Updated : 03 May, 2020 Comments Improve Suggest changes Like Article Like Report Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.FieldByIndex() Function in Golang is used to get the nested field corresponding to index. To access this function, one needs to imports the reflect package in the program. Syntax: func (v Value) FieldByIndex(index []int) Value Parameters: This function accept only single parameters. index : This parameter is the []int type. Return Value: This function returns the nested field corresponding to index. Below examples illustrate the use of the above method in Golang: Example 1: C // Golang program to illustrate // reflect.FieldByIndex() Function package main import ( "fmt" "reflect" ) // Main function func main() { tt:= reflect.StructOf([]reflect.StructField{ { Name: "Height", Type: reflect.TypeOf(0.0), Tag: `json:"height"`, }, { Name: "Name", Type: reflect.TypeOf("abc"), Tag: `json:"name"`, }, }) // use of FieldByIndex() method fmt.Println(tt.FieldByIndex([]int{0})) } Output: {Height float64 json:"height" 0 [0] false} Example 2: C // Golang program to illustrate // reflect.FieldByIndex() Function package main import ( "fmt" "reflect" ) type User struct { Id int Name string Age int } type Manager struct { User Title string } // Main function func main() { m := Manager{User: User{1, "Jack", 12}, Title: "123"} t := reflect.TypeOf(m) fmt.Printf("%#v\n", t.Field(0)) fmt.Printf("%#v \n", t.Field(1)) // use of FieldByIndex() method fmt.Printf("%#v \n", t.FieldByIndex([]int{0, 0})) fmt.Printf("%#v \n", t.FieldByIndex([]int{0, 1})) fmt.Printf("%#v \n", t.FieldByIndex([]int{0, 2})) } Output: reflect.StructField{Name:"User", PkgPath:"", Type:(*reflect.rtype)(0x4b1480), Tag:"", Offset:0x0, Index:[]int{0}, Anonymous:true} reflect.StructField{Name:"Title", PkgPath:"", Type:(*reflect.rtype)(0x4a1c20), Tag:"", Offset:0x20, Index:[]int{1}, Anonymous:false} reflect.StructField{Name:"Id", PkgPath:"", Type:(*reflect.rtype)(0x4a14e0), Tag:"", Offset:0x0, Index:[]int{0}, Anonymous:false} reflect.StructField{Name:"Name", PkgPath:"", Type:(*reflect.rtype)(0x4a1c20), Tag:"", Offset:0x8, Index:[]int{1}, Anonymous:false} reflect.StructField{Name:"Age", PkgPath:"", Type:(*reflect.rtype)(0x4a14e0), Tag:"", Offset:0x18, Index:[]int{2}, Anonymous:false} Comment More infoAdvertise with us Next Article reflect.FieldByIndex() Function in Golang with Examples S SHUBHAMSINGH10 Follow Improve Article Tags : Go Language Golang-reflect Similar Reads reflect.FieldByName() Function in Golang with Examples Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.FieldByName() Function in Golang is used to get the struct field with the given name. To access this function, on 2 min read reflect.Field() Function in Golang with Examples Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.Field() Function in Golang is used to get the i'th field of the struct v. To access this function, one needs to i 2 min read reflect.Float() Function in Golang with Examples Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.Float() Function in Golang is used to get the v's underlying value, as a float64. To access this function, one ne 1 min read reflect.FuncOf() Function in Golang with Examples Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.FuncOf() Function in Golang is used to get the function type with the given argument and result types, i.e., if k 2 min read reflect.Kind() Function in Golang with Examples Go language provides inbuilt support implementation of run-time reflection and allowing a program to manipulate objects with arbitrary types with the help of reflect package. The reflect.Kind() Function in Golang is used to find the name of kind. To access this function, one needs to imports the ref 2 min read Like