GO learning - 010 slice op

package main

import "fmt"

func main() {
	var numbers = make([]int, 3, 5)

	fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)

	numbers = append(numbers, 1)

	fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)

	numbers = append(numbers, 2)

	fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)

	numbers = append(numbers, 3)

	fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers), cap(numbers), numbers)

	fmt.Println("---------------")
	var numbers2 = make([]int, 3)
	fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers2), cap(numbers2), numbers2)
	numbers2 = append(numbers2, 1)
	fmt.Printf("len = %d, cap = %d, slice = %v\n", len(numbers2), cap(numbers2), numbers2)

}

len = 3, cap = 5, slice = [0 0 0]
len = 4, cap = 5, slice = [0 0 0 1]
len = 5, cap = 5, slice = [0 0 0 1 2]
len = 6, cap = 10, slice = [0 0 0 1 2 3]
---------------
len = 3, cap = 3, slice = [0 0 0]
len = 4, cap = 6, slice = [0 0 0 1]

package main

import "fmt"

func main() {
	s := []int{1, 2, 3}

	s1 := s[0:2]

	fmt.Println(s1)

	s1[0] = 100
	fmt.Println(s)
	fmt.Println(s1)

	s2 := make([]int, 3)

	copy(s2, s)
	fmt.Println(s2)
}

[1 2]
[100 2 3]
[100 2]
[100 2 3]