Go language - value types and reference types

Value type and reference type

Value type ：int、float、bool、string、 Array array、 Structure struct

Reference type ： The pointer 、 section slice、map、 Interface interface、 function func、 The Conduit chan

difference

Value type ：

• Variables store values directly , Memory is usually allocated in the stack .
• When assigning a value to a new variable ( When copying ), Is a deep copy , Directly create a new memory address to store values .

Reference type ：

• Variables store memory addresses directly , This address stores values . Memory is usually reallocated on the heap .
• When assigning a value to a new variable ( When copying ), For light copy , The new variable points to the original memory address through a pointer . have access to copy Keyword implements a deep copy of the reference type .
• When no variable references this address , This address will be GC Garbage collection .