Value type : int, float, bool, string, array, structure struct, use these types of variables to directly point to the value in memory, the value type variables are stored in the stack area.
When the equal sign "=" is used to assign the value of one variable to another variable, such as j = i, the value of i is actually copied in memory.
Reference type : refers to three predefined types : slice, map, and channel. Reference types are more copied data structures.
(1) Allocate memory:
(2) Initialize a series of attributes, etc. A reference type variable r1 stores the memory address (number) where the value of r1 is located, or the location of the first byte in the memory address . This memory address is called a pointer .
Value type: var num = 100 =>
Reference type: such as ref =>
The variable stores an address, and the space corresponding to this address actually stores data.
