What unique characteristics do slices in Go have?

Slices in Go are dynamic, mutable views into the elements of an array. Unique characteristics of slices:

• Dynamic size: unlike arrays, slices can change their length during runtime.
• Reference to array: a slice contains a pointer to the underlying array, along with its length and capacity.
• Capacity and length: length is the number of elements in the slice, capacity is the maximum number of elements the slice can hold without allocating new memory.
• Copying slices: copying a slice copies the structure, but not the data, meaning both slices refer to the same array.

Example of creating a slice:

arr := [5]int{1, 2, 3, 4, 5}
slice := arr[1:4] // slice with elements 2, 3, 4