go切片默认初始化len为0，既元素无法直接赋值为[0]=xx

package main

import "fmt"

func main() {
   var s =[]string{}  //默认元素是【0】  应该为make([]string,3)
   s[0]="test"    //无法向【0】元素添加数据
   fmt.Println(s)

}


//

panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
main.main()
D:/awesomeProject/src/test/test25.go:7 +0x18