Create Slice with Make in Golang

Application

Create new folder named src. In src folder, create new file named main.go as below:

package main

import (
	"fmt"
)

func main() {

	slice1 := make([]int, 3)
	fmt.Println("Length:", len(slice1))
	fmt.Println("Capacity:", cap(slice1))
	slice1[0] = 4
	slice1[1] = 2
	slice1[2] = -4
	slice1 = append(slice1, 20)
	slice1 = append(slice1, 20, 30, 40, 50)
	fmt.Println("slice 1: ", slice1)

	slice2 := make([]int, 4, 8)
	fmt.Println("Length:", len(slice2))
	fmt.Println("Capacity:", cap(slice2))
	slice2[0] = 2
	slice2[1] = 9
	slice2[2] = -8
	fmt.Println("slice 2: ", slice2)

}

Output

Open Terminal windows in Visual Studio Code and run command line: go run main.go

Length: 3
Capacity: 3
slice 1:  [4 2 -4 20 20 30 40 50]
Length: 4
Capacity: 8
slice 2:  [2 9 -8 0]