Define function prototype. How function overloading is achieved? Mention advantages of using inline function.

 A function prototype is a declaration of a function that specifies the function's name, return type, and parameter types. It is used to inform the compiler about the existence of a function before it is called in the program.

Function overloading is achieved by defining multiple functions with the same name but different parameter lists. When a function call is made with a particular name, the compiler determines which function to call based on the number, types, and order of the arguments passed. This allows a programmer to define functions that perform similar operations but with different data types or number of arguments. The compiler distinguishes between the different functions based on their signatures.

For example, consider the following functions:

void add(int a, int b);
void add(double a, double b);

Both functions are named "add", but one takes two integers as arguments while the other takes two doubles. When the program calls the "add" function, the compiler checks the argument types and decides which function to execute.

Function overloading provides several advantages, including making the code more readable, improving code reusability, and reducing the need for separate function names for similar operations.

Advantages of using inline function:

1. Faster Execution: Inline functions can be executed faster than regular functions because there is no function call overhead. The code of the function is inserted directly into the calling code.
2. Code Optimization: Inline functions can help optimize the code by reducing the number of function calls and making the code more readable.
3. Improved Performance: Inline functions can improve the performance of the program by reducing the time required to execute function calls.
4. Avoidance of Call Stack Overhead: Since inline functions don’t use the call stack, it can save time that would have been used to push and pop data on the call stack.