As a software developer C++ 11 when should I use the keyword const?

The keyword "const" in C++ 11 is used to indicate that a variable or object is constant and cannot be modified. It is important because it helps to prevent accidental modification of variables and improves code readability.

For example, when declaring a constant variable:

const int max_value = 100;

In this example, the variable "max_value" is a constant and cannot be modified. This can be useful in situations where the value of a variable should never change, such as a maximum limit for a loop or a constant value in a mathematical formula.

Another example is when declaring a constant object:

class MyClass {
public:
    MyClass(int x) : x_(x) {}
    int getX() const { return x_; }

private:
    int x_;
};

const MyClass myObject(5);

In this example, the object "myObject" is a constant object and cannot be modified. The "const" keyword is also used in the class's "getX" method, indicating that the method does not modify any members of the class.

Using the keyword "const" in C++ 11 is important because it helps to prevent accidental modification of variables and improves code readability. It also allows the compiler to optimize code more effectively by allowing it to make assumptions about the state of variables and objects. Overall, using "const" in C++ 11 can lead to more robust and maintainable code.