What are inline functions in C++?

What are inline functions in C++?

Inline functions in C++ are functions defined with the keyword 'inline' that suggest to the compiler to insert the function's body directly into the code where the function is called.

Why would I use inline functions instead of regular functions?

Using inline functions can reduce the overhead of function calls, potentially improving performance, especially for small, frequently called functions.

Are there any downsides to using inline functions?

Yes, if the function is too large, inlining can increase the code size, which may negatively impact performance due to cache misses.

Can you give me an example of an inline function?

Sure! Here's a simple example:

inline int add(int a, int b) {
    return a + b;
}

This function can be called like a regular function, but the compiler may inline it.