How do we combine multiple error strings in Golang?

I am new to golang, my application needs to return multiple errors in a loop, later requires to be combined and returned as a single error string. I am not able to use the string functions to combine the error messages. What methods can be use to combine these errors into a single error before returning?

package main

import (
   "fmt"
   "strings"
)

func Servreturn() (err error) {

   err1 = fmt.Errorf("Something else occurred")
   err2 = fmt.Errorf("Something else occurred again")

   // concatenate both errors

   return err3

}

You could use the strings.Join() and append() function to acheive this slice.

example: golang playgorund

package main

import (
    "fmt"
    "strings"
    "syscall"
)

func main() {

    // create a slice for the errors
    var errstrings []string 

    // first error
    err1 := fmt.Errorf("First error:server error")
    errstrings = append(errstrings, err1.Error())

    // do something 
    err2 := fmt.Errorf("Second error:%s", syscall.ENOPKG.Error())
    errstrings = append(errstrings, err2.Error())

    // do something else
    err3 := fmt.Errorf("Third error:%s", syscall.ENOTCONN.Error())
    errstrings = append(errstrings, err3.Error())

    // combine and print all the error
    fmt.Println(fmt.Errorf(strings.Join(errstrings, "\n")))


}

This would output a single string which you can send back to the client.

First error:server1 
Second error:Package not installed 
Third error:Socket is not connected

hope this helps!