What is the difference between slices and arrays in Go?

Arrays have a fixed length determined at creation. Slices are dynamic views of underlying arrays.

Main differences:

Attribute	Array	Slice
Length	Fixed	Dynamic
Creation	[N]Type (N - size)	[]Type or make([]Type, len, cap)
Passing	By value	By reference (to the underlying array)
Resizing	Not possible	Possible (using append)

Examples:

// Declaring and initializing an array
var arr [3]int // array of 3 ints, initialized with zeros
arr2 := [2]string{"a", "b"} // array of 2 strings

// Declaring and initializing slices
var slice []int // nil slice
slice2 := []string{"x", "y", "z"} // slice of 3 strings
slice3 := make([]int, 5) // slice of 5 ints, initialized with zeros
slice4 := make([]int, 2, 5) // slice of 2 ints, initialized with zeros, capacity 5

// Slice behavior example
arr := [5]int{1, 2, 3, 4, 5}
slice := arr[1:4] // slice referencing arr[1], arr[2], arr[3]
slice[0] = 99 // modifies arr[1]

// Resizing a slice
slice = append(slice, 100) // creates a new underlying array if current one cannot hold the element

Slices are more flexible and often used instead of arrays in Go. They provide a convenient way to work with variable-length sequences of data.