What does const mean at the end of a class member function declaration in C++?

Hello colleagues! I started learning C++ not long ago and encountered syntax that is completely unclear to me. I see in code class method declarations where the keyword `const` appears after the parameter list. For example: ```cpp class MyClass { public: int getValue() const; // What does this const mean? void setValue(int v); }; ``` I understand that `const` before a variable type makes it immutable (for example, `const int x = 5;`). But what does `const` at the end of a function declaration do? I tried to write such a method, but when I tried to modify a class field inside it, the compiler gave an error. Why? Here is my code that does not compile: ```cpp class Counter { private: int count = 0; public: int getCount() const { count = 10; // Error: cannot modi