What are the differences between Kotlin inline functions and regular functions?

The main differences between Kotlin inline functions and regular functions are mainly reflected in the following aspects:

1. Inline functions will copy and paste the code at the function call site during compilation, whereas regular functions will execute the function call at runtime. This allows for reducing the overhead of function calls and improving the performance of the program.
2. Inline functions have access to properties and methods of function parameters, while regular functions do not. This is because inline functions perform copy and paste at the call site, while regular functions execute in the function body.
3. Inline functions can receive parameters of function types and can call these parameters within the function body as code blocks, whereas regular functions require the use of function references or lambda expressions to pass and call function type parameters.
4. Inline functions cannot call themselves recursively, while regular functions can. This is because inline functions copy and paste the code at the call site during compilation, and allowing recursive calls would result in infinite copying and pasting, eventually leading to a stack overflow.

In general, inline functions are suitable for functions that need to be called frequently, as they can reduce the cost of function calls and improve program performance; while regular functions are suitable for general function call scenarios, can recursively call themselves, and do not require copying and pasting code.