Understanding Constants in C++

C++ Constants

Constants Overview

In C++, when you need to ensure that a variable's value remains unchanged throughout the program, you can declare it as a constant using the const keyword. This indicates that the variable is immutable and read-only. Declaring variables as constants is recommended for values that are not expected to change, enhancing code reliability and readability.

Important Considerations for Constants

When defining a constant variable in C++, it must be initialized with a value at the time of declaration. This value will remain fixed and cannot be modified later in the program. This practice helps prevent accidental changes and maintains the integrity of the data.

const int myNum = 15;
std::cout << myNum;

By using const, you protect your variables from being altered unintentionally, ensuring predictable behavior in your C++ applications.