Here is a simple program in C++ that uses the `const` keyword to define the value of pi and then prints it to the console with two decimal places. ```cpp #include #include int main() { const double PI = 3.14159; std::cout

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Here is a simple program in C++ that uses the `const` keyword to define the value of pi and then prints it to the console with two decimal places. ```cpp #include #include int main() { const double PI = 3.14159; std::cout << "Value of pi: " << std::fixed << std::setprecision(2) << PI << std::endl; return 0; } ``` Here's how it works: 1. `#include ` and `#include ` are preprocessor directives that include the iostream and iomanip libraries. The iostream library allows us to use objects like `std::cout` and `std::endl` for output, and the iomanip library allows us to manipulate the output using functions like `std::fixed` and `std::setprecision`. 2. `int main()` is the main function where our program starts execution. 3. `const double PI = 3.14159;` declares a constant double named PI and initializes it with the value 3.14159. The `const` keyword means that the value of PI cannot be changed after it is initialized. 4. `std::cout << "Value of pi: " << std::fixed << std::setprecision(2) << PI << std::endl;` prints "Value of pi: ", followed by the value of PI with two decimal places. `std::fixed` and `std::setprecision(2)` are used to format the output to two decimal places. 5. `return 0;` ends the program and returns 0 to indicate that the program has finished successfully.

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Here is a simple program in C++ that uses the `const` keyword to define the value of pi and then prints it to the console with two decimal places. ```cpp #include #include int main() { const double PI = 3.14159; std::cout << "Value of pi: " << std::fixed << std::setprecision(2) << PI << std::endl; return 0; } ``` Here's how it works: 1. `#include ` and `#include ` are preprocessor directives that include the iostream and iomanip libraries. The iostream library allows us to use objects like `std::cout` and `std::endl` for output, and the iomanip library allows us to manipulate the output using functions like `std::fixed` and `std::setprecision`. 2. `int main()` is the main function where our program starts execution. 3. `const double PI = 3.14159;` declares a constant double named PI and initializes it with the value 3.14159. The `const` keyword means that the value of PI cannot be changed after it is initialized. 4. `std::cout << "Value of pi: " << std::fixed << std::setprecision(2) << PI << std::endl;` prints "Value of pi: ", followed by the value of PI with two decimal places. `std::fixed` and `std::setprecision(2)` are used to format the output to two decimal places. 5. `return 0;` ends the program and returns 0 to indicate that the program has finished successfully.

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