Also, there is one thing that might seem kind of silly to say in this book because it seem obvious, but many people wonder about it. You should know that using short variable names like
num instead of longer, more descriptive variable names like
numSlides does not save you any memory when your program actually runs. Using these longer variable names is better because they’ll make your program more readable.
You might also come up with some clever tricks that do save a few bytes of memory here and there. One trick is that when you no longer need a variable, you can reuse that variable name for a different purpose instead of just using two differently named variables.
Try to avoid the temptation to do this. Usually, these tricks reduce code readability and make it harder to debug your programs. Modern computers have billions of bytes of memory, and saving a few bytes here and there really isn’t worth making the code more confusing for human programmers.