How do I use const correctly in C++?

In C++, the `const` keyword is used to define constant values or to indicate that a variable's value will not be modified. This is particularly useful for improving the safety and readability of your code. By declaring variables as `const`, you can prevent accidental changes to them.

There are several common uses of `const`:

Constant Variables: You can use `const` to declare a variable whose value cannot change throughout its lifetime.
Constant Pointers: You can declare pointers as `const` to prevent the data they point to from being modified.
Constant Member Functions: In classes, you can declare member functions as `const` to indicate they do not modify the object state.

Here is an example demonstrating the use of `const` in different contexts:


        const int CONSTANT_VALUE = 100; // Constant variable

        void exampleFunction(const int *ptr) { 
            // Function that takes a pointer to a constant integer
            // *ptr = 200; // This would cause a compilation error
            std::cout << *ptr << std::endl;
        }

        class MyClass {
        public:
            void regularFunction() {
                // Modify member variables
            }

            void constFunction() {
                // Cannot modify member variables
                std::cout << "This is a const function" << std::endl;
            }
        };

How do I use const correctly in C++?

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How do I use const correctly in C++?

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