slice initialization Golang

initslice.go

package main

import "fmt"

func main() {
	var a []int
	a = make([]int, 5)
	for i := 0; i < 5; i++ {
		a = append(a, i)
		fmt.Println(a)
	}
	fmt.Printf("len=%d cap=%d slice=%v", len(a), cap(a), a)
	a = make([]int, 0, 5)
	for i := 0; i < 5; i++ {
		a = append(a, i)
		fmt.Println(a)
	}
	fmt.Printf("len=%d cap=%d slice=%v", len(a), cap(a), a)
}