package main import ( "log" "os" "text/template" ) func main() { // Define a template. const letter = ` Dear {{.Name}}, {{if .Attended}} It was a pleasure to see you at the wedding. {{- else}} It is a shame you couldn't make it to the wedding. {{- end}} {{with .Gift -}} Thank you for the lovely {{.}}. {{end}} Best wishes, Josie ` // Prepare some data to insert into the template. type Recipient struct { Name, Gift string Attended bool } var recipients = []Recipient{ {"Aunt Mildred", "bone china tea set", true}, {"Uncle John", "moleskin pants", false}, {"Cousin Rodney", "", false}, } // Create a new template and parse the letter into it. t := template.Must(template.New("letter").Parse(letter)) // Execute the template for each recipient. for _, r := range recipients { err := t.Execute(os.Stdout, r) if err != nil { log.Println("executing template:", err) } } }