Execute code repeatedly using the classic loop structures.
Loops are a fundamental concept in programming that allow you to execute a block of code multiple times without rewriting it. JavaScript provides several ways to create loops. The `for` loop is the most common and is ideal when you know how many times you want the loop to run. It consists of three parts: an initializer (executed once before the loop starts), a condition (checked before each iteration), and a final expression (executed at the end of each iteration). The `while` loop is simpler in structure. It repeatedly executes a block of code as long as a specified condition is `true`. The condition is checked *before* each iteration, so if the condition is initially false, the loop will never execute. This is useful when the number of iterations is not known beforehand, and depends on some changing state within the loop. The `do...while` loop is a variation of the `while` loop. The key difference is that the condition is checked *after* the code block is executed. This means the code inside a `do...while` loop is guaranteed to run at least once, even if the condition is initially false. Choosing the right loop for the task is important for writing clean and efficient code.