The difference between go language array and slice

GO Language array and slice What's the difference ？

Array Array：

1. The data type of the array is the value type
2. You need to specify the length when declaring an array .[size]type{}
3. Array is fixed length , No expansion is allowed
4. Array get len()、cap() The value of is the same . Because arrays are fixed length , Length and capacity are consistent

section Slice：

1. The data type of the slice is the reference type
2. There is no need to specify the length when declaring slices .[]type{}; however make Keyword declaration can specify the length and capacity of the slice make([]type, len, size)
3. Slice is of variable length , Capacity expansion . Slices are also called variable length arrays 、 The dynamic array
4. Slice to get len()、cap() The value of is not necessarily the same . Because the slice is of variable length , But the capacity can be automatically expanded
5. Slicing is actually pointing to an underlying array , The elements that manipulate slices are actually elements that manipulate arrays . If the slice expands , The underlying array will be created .