Need for Inline functions in Programming

Long sections of repeated code are generally better off as normal functions: The savings in memory space is worth the comparatively small sacrifice in execution speed. But making a short section of code into an ordinary function may result in little savings in memory space, while imposing just as much time penalty as a larger function. You could simply repeat the necessary code in your program, inserting the same group of statements wherever it was needed. The trouble with repeatedly inserting the same code is that you lose the benefits of program organization and clarity that come with using functions. The program may run faster and take less space, but the listing is longer and more complex. The solution to this problem is inline function. This kind of function is written like a normal function in the source file but compiles into inline code instead of into a function. The source file remains well organized and easy to read, since the function is shown as a separate entity.