title: String and integer concatenation issues golang
body: <p>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. </p>
  
  <pre><code>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 &lt; 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)
  
      }
  }
  </code></pre>
  
  <p>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 ? </p>