Go--append()

作用：在原切片的末尾添加元素

实例：

package main

import "fmt"

func main() {
    s1 := []int{}
    fmt.Printf("len = %d, cap = %d\n", len(s1), cap(s1))
    fmt.Println("s1 = ", s1)
    fmt.Println()

    //在原切片的末尾添加元素
    s1 = append(s1, 1)
    s1 = append(s1, 2)
    s1 = append(s1, 3, 4)
    fmt.Printf("len = %d, cap = %d\n", len(s1), cap(s1))
    fmt.Println("s1 = ", s1)
}

执行结果：