05. Loops & Iteration

Loops provide a way to repeat a specific block of code multiple times without writing the same lines over and over again. The `for` loop is the most versatile, consisting of an initializer, a condition, and an increment/decrement expression. `while` loops are better suited for scenarios where you don't know exactly how many iterations you need beforehand. In modern JS, we often use `for...of` for arrays or `.forEach()` for simple iteration, though `for` remains the fastest. Infinite loops are a common pitfall; always ensure your exit condition will eventually evaluate to false to avoid crashes. Efficient iteration handles large datasets quickly and is a fundamental skill for any developer working with complex data.