Question

How to append numbers to a slice in Go

Answer 1

package main

import "fmt"

func main() {
	var sl []int
	show(sl)

	sl = append(sl, 2)
	sl = append(sl, 7)
	show(sl)

	sl = append(sl, 45, 76, 99)
	show(sl)
}

func show(sl []int) {
	fmt.Printf("len=%d cap=%d %v\n", len(sl), cap(sl), sl)
}



/*
run:

len=0 cap=0 []
len=2 cap=2 [2 7]
len=5 cap=8 [2 7 45 76 99]

*/

 

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