Deleting from Maps

Key-value pairs are removed from a map via the built-in delete function:

m := map[string]int{
    "hello": 5,
    "world": 10,
}
delete(m, "hello")

The delete function takes a map and a key and then removes the key-value pair with the specified key. If the key isn’t present in the map or if the map is nil, nothing happens. The delete function doesn’t return a value.