golang os.Close() function works, but os.Remove() function does not - go

Question

I am trying to create a file, open it, do some processing on it & close it. Finally, I want to delete the file.
All these operations are executed successfully, except the deletion.
My code is:
package main
import (
"fmt"
"os"
"log"
)
func main() {
fmt.Println("Hello")
metaFileName := "./metadata.txt"
_, err2 := os.Create(metaFileName)
if err2 != nil {
log.Fatal(err2)
}
openMetaFile, err := os.Open(metaFileName)
if err != nil {
log.Fatal(err)
}
err = openMetaFile.Close()
if err != nil {
log.Fatal(err)
}
err = os.Remove(metaFileName)
if err != nil {
log.Fatal(err)
}
fmt.Println("Success")
}
The output is:
Hello
2020/08/24 00:00:00 remove ./metadata.txt: The process cannot access the file be
cause it is being used by another process.
I am clueless about this

Answer 1

The problem is related to the first opened file.
package main
import (
"fmt"
"log"
"os"
)
const metaFileName = "./metadata.txt"
func main() {
var (
err error
tmpFile, openMetaFile *os.File
)
fmt.Println("Hello")
if tmpFile, err = os.Create(metaFileName); err != nil {
log.Fatal(err)
}
if err = tmpFile.Close(); err != nil {
log.Fatal(err)
}
if openMetaFile, err = os.Open(metaFileName); err != nil {
log.Fatal(err)
}
if err = openMetaFile.Close(); err != nil {
log.Fatal(err)
}
if err = os.Remove(metaFileName); err != nil {
log.Fatal(err)
}
fmt.Println("Success")
}
As you can see, i've used the var a in order to close the first file that you have opened. The result is following one:
Hello
Success