Inline Functions in C++

An inline function in C++ programming is a special type of function used when we want to reduce the time wasted by repeated function calls. In an inline function, whenever it is called, it is not processed like a normal function; instead, its code is directly "inlined" at the place from where it is called. This can reduce the overhead of function calls.

An inline function is a function for which the compiler is directed to place the code of the function's body at the same location where the function is being called, instead of making a function call. This process saves the overhead of a function call and speeds up the program. We use the `inline` keyword before the function.

Use an inline function when the function's code is small, it is called repeatedly, and repeated calls are slowing down the program. It should not be used for large functions.

Time saving, suitable for small functions, improved performance, and reduced function overhead.

Not suitable for large functions (can increase memory consumption), the compiler makes the final decision on whether to inline, can be problematic in a large code base, and recursive functions cannot be inlined.