Web Reference: In the first example, let i = 5; is declared outside the loop. In the second example, let i = 0;, is declared inside the loop. When a variable is declared with let or const inside a loop, it will only be visible within the loop. Nov 3, 2025 · Loops offer a quick and easy way to do something repeatedly. This chapter of the JavaScript Guide introduces the different iteration statements available to JavaScript. Dive deep into the world of JavaScript loops with this in-depth tutorial! Learn all about for loops in JavaScript, from basic syntax to advanced applications.
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