Purpose of Inline Functions in C++

The purpose of inline functions in C++ is to directly insert the function body at the call site during compilation, rather than executing the function through a function call. This helps reduce the overhead of function calls and improves program efficiency. Inline functions are typically suitable for small function bodies that are frequently called, as they can reduce the overhead of function calls and improve program performance. It is important to note that inline functions are inserted directly at the call site during compilation, so the function body of inline functions should generally be kept simple to avoid increasing the size of the program.