Sometimes in niche situations we might get confused between i++ and ++i. This example is a simple one to understand the difference between the two.
i++: Post-increment operation++i: Pre-increment operation
var i = 0;
var a = i++; // a is assigned the value of 0, then i is incremented to 1
console.log(a, i); // Output: 0 1
var j = 0;
var b = ++j; // j is incremented to 1, then b is assigned the value of 1
console.log(b, j); // Output: 1 1
FOR loops
It doesn’t affect FOR loops because the addition is done separately anyways without really affecting the looping