Go

Below are examples of how to create a slice:

• By specifying the length and the length of the underlying array.
• By using the [low : high] expression.

Additionally, how to append and copy slices.

package main

import "fmt"

func main() {
	// A slice of length 7 with a underlying array of length 14
	x := make([]float64, 7, 14)
	fmt.Println(x)

	// Another way to create a slice is the [low : high] expression.
	arr := [5]float64{1, 2, 3, 4, 5}
	slice1 := arr[0:5]
	slice2 := arr[1:4] // High index does not include the index itself
	slice3 := arr[0:]  // Same as arr[0:len(arr)]
	slice4 := arr[:3]  // Same as arr[0:3]
	slice5 := arr[:]   // Same as arr[0:len(arr)]
	fmt.Println(slice1, slice2, slice3, slice4, slice5)

	// Append
	slice6 := []int{1, 2, 3}
	slice7 := append(slice6, 4, 5)
	fmt.Println(slice6, slice7)

	// Copy
	slice8 := []int{1, 2, 3}
	slice9 := make([]int, 2)
	copy(slice9, slice8)        // Copy has two arguments. 'dst' and 'src'.
	fmt.Println(slice8, slice9) // Only the first two elements are copied into slice9.
}