Convert String to Lowercase and Uppercase in Golang

package main

import (
    "fmt"
    "strings"
)

func main() {

    name1 := "kevin"
    name1 = strings.ToUpper(name1)
    fmt.Println(name1)

    name2 := "MARY"
    name2 = strings.ToLower(name2)
    fmt.Println(name2)

}    

Output

KEVIN
mary