What is the range keyword and how is it used?

The range keyword in Go: • Iterates over arrays, slices, maps, channels, strings • Returns index/key and value • Can ignore values using blank identifier • Different behavior for different types Examples: // Slice for i, v := range slice { fmt.Println(i, v) } // Map for key, value := range m { fmt.Println(key, value) } // String (runes) for i, r := range "hello" { fmt.Println(i, string(r)) } // Channel for value := range ch { fmt.Println(value) }