Quickly distinguish slices and arrays

The main difference between slicing and data is ： Variable slice capacity , The length of the array is immutable . Therefore, the length of an array needs to be determined when it is declared . Slicing doesn't need . In actual development, we can distinguish between the two by distinguishing whether there is a set length in brackets , If the length is set, it must be an array , Otherwise it must be sliced .

Illustrate with examples ：

var a = [0]int{} The length is 0 Array of

var c = [6]int{} The length is 6 Array of

var b = [...]int{1,3,7} The length is 3 Array of The three points indicate that the array length is based on the number of elements actually given at the time of declaration .