String and integer concatenation issues golang

I am trying to write a port scanner in Go, i am facing few problems since i am new to this. Below is the code i have written till now.

package main
import (
	"fmt"
	"log"
	"net"
	"os"
)
func main() {
	callme()
}
func callme() {
	var status string
	getip := os.Args[1]
	getport := 0
	for i := 0; i < 10; i++ {
		getport += i
		data := getip + ":" + getport
		conn, err := net.Dial("tcp", data)
		if err != nil {
			log.Println("Connection error:", err)
			status = "Unreachable"
		} else {
			status = getport + " - " + "Open"
			defer conn.Close()
		}
		fmt.Println(status)
	}
}

I take ip from user as a command line arg, and then want to scan all ports on this ip. Since the net.Dial function needs data in a format like "ip:port" i am kinda confused how to concat string and int each time. Can any1 help me achieve this ?

One possibility is using strconv.Itoa(getport) to convert the int into a string. Another possibility is formatting the string, as in fmt.Sprintf("%s:%d", getip, getport) or fmt.Sprintf("%d - Open", getport).