go语言 append 函数的使用

Posted 2021-12-05 张志翔ۤ

        1、append函数的使用

        作用：在原切片的末尾添加元素

        示例：  

package main //必须有个main包
 
import "fmt"
 
func main() {
    s1 := []int{}
    fmt.Printf("len = %d, cap = %d\\n", len(s1), cap(s1))
    fmt.Println("s1 = ", s1)
 
    //在原切片的末尾添加元素
    s1 = append(s1, 1)
    s1 = append(s1, 2)
    s1 = append(s1, 3)
    fmt.Printf("len = %d, cap = %d\\n", len(s1), cap(s1))
    fmt.Println("s1 = ", s1)
 
    s2 := []int{1, 2, 3}
    fmt.Println("s2 = ", s2)
    s2 = append(s2, 5)
    s2 = append(s2, 5)
    s2 = append(s2, 5)
    fmt.Println("s2 = ", s2)
}

        #执行结果：

len = 0, cap = 0
s1 =  []
len = 3, cap = 4
s1 =  [1 2 3]
 
s2 =  [1 2 3]
s2 =  [1 2 3 5 5 5]

        到此 go语言 append 函数的使用介绍完成。