Q$1$: Create a function for each of the following, make sure to have the nain function in your project and to use prototype concept:

Basic Function Definition

Write a function named greet that takes no parameters and prints "Elden Ring is the best video game ever" to the console.

Function with Parameters

Define a function named add that takes two integers as parameters and returns their sum.

Function with Return Value

Write a function named square that takes an integer as a parameter and returns its square $($use the math class$).$

Default Parameters

Write a function named multiply that takes two integers and returns their product. Provide a default value of $1$ for the second parameter.

Pass by Reference

Define a function swap that swaps the values of two integer variables using pass by reference.

Function with String

Write a function greetUser that takes a string as a parameter and prints "Hello, $!"$ where is the string passed to the function.

Overloading Functions

Define two overloaded functions named print that take an integer and a double as parameters respectively and print them to the console.

Returning Boolean Values

Write a function isEven that takes an integer and returns true if the number is even and false if the number is odd. in c$++$