Invoke Methods in Golang Reflection

package main

import (
    "fmt"
    "reflect"
)

type Student struct {
    Id    string
    Name  string
    Age   int
    Score float64
}

func (this Student) Rank() string {
    if this.Score >= 8 {
        return "A"
    } else if this.Score >= 7 {
        return "B"
    } else if this.Score >= 6 {
        return "C"
    } else if this.Score >= 5 {
        return "D"
    } else {
        return "E"
    }
}

func main() {

    student := Student{
        Id:    "st01",
        Name:  "Name 1",
        Age:   20,
        Score: 5.6,
    }
    values := reflect.ValueOf(&student).MethodByName("Rank").Call([]reflect.Value{})
    fmt.Println(values[0].String())
}        
        

Output

D