How to import and use the container/set package in Go?

To import and use the container/set package in Go, you can follow these steps:

1. Open your Go file and add the import statement:

   import "container/set"

2. Create and initialize a new set:

   mySet := set.New()

3. Add elements to the set:

   mySet.Add("apple") mySet.Add("banana") mySet.Add("orange")

4. Check if an element exists in the set:

   exists := mySet.Has("banana") fmt.Println(exists) // Output: true

5. Remove an element from the set:

   mySet.Remove("banana") exists = mySet.Has("banana") fmt.Println(exists) // Output: false

6. Get the number of elements in the set:

   size := mySet.Size() fmt.Println(size) // Output: 2

7. Iterate over the elements of the set:

   for element := range mySet.Iter() { fmt.Println(element) }

   This will print:

   apple orange

Note: The container/set package in Go is deprecated and is no longer recommended for use. Instead, you can use the native map data structure or use a third-party package like "github.com/deckarep/golang-set" for a more comprehensive set implementation.