package main import ( "fmt" "strings" ) func main() { fmt.Println( // true strings.Contains("test", "es"), // 2 strings.Count("test", "t"), // true strings.HasPrefix("test", "te"), // true strings.HasSuffix("test", "st"), // 1 strings.Index("test", "e"), // "a-b" strings.Join([]string{"a","b"}, "-"), // == "aaaaa" strings.Repeat("a", 5), // "bbaa" strings.Replace("aaaa", "a", "b", 2), // []string{"a","b","c","d","e"} strings.Split("a-b-c-d-e", "-"), // "test" strings.ToLower("TEST"), // "TEST" strings.ToUpper("test"), ) }