Second one is better approach because ... in a loop that is a extra burden to JVM. ... Best practice suggests writing the most readable code first, rather than micro-optimizing... 2012-05-11T08:27:06.24Z+00:00 ... Thanks @JonSkeet. But in many places it is often misread or misunderstood.I also thought that best practices means, writing code that will be too lite for JVM to execute. 2012-05-11T08:49:23.9Z+00:00 ... Im not so sure but i think the optimizer of java will replace ... More on stackoverflow.com

The syntax of for loops in C-like languages is not exactly intuitive. Even the name "for" seems like a rather non-descriptive, meaningless word. I don't know how for loops are commonly taught, but perhaps it is common to see them introduced with examples like this: for (int i = 0; i < 10; ++i) print i; Now, it is true that the most common use of for loops is to repeat something a certain number of times like this, but if this is how for loops are introduced, then I can understand how they seem mysterious. What in the world is all that garbage syntax doing there for a simple counting loop? Why are there all of those semicolons, and why do you have to say ++i? Etc. It would be better, I think, to teach that the loop for (initialization; condition; update) statement; is (almost) equivalent to initialization; while (condition) { statement; update; } and then show several examples of the same code written in both of these ways to demonstrate and reinforce this equivalence. These examples should include not only the common case of repeating a statement a certain number of times, but also other uses of the for loop, such as finding the length of a C string (where the condition is like *p != '\0'). More on reddit.com

python only has for each loops More on reddit.com

Try writing it all out on paper, erasing and updating each variable. The inner loop is going to be repeated on each iteration of the outer loop. More on reddit.com