Web Reference: Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more. Whether you are tracking a user's score, holding an API response, or counting loop iterations, you are using variables. JavaScript offers three ways to declare variables: let, const, and var. Each behaves differently in subtle but important ways, and choosing the right one matters. Jul 11, 2025 · Variable declared by let cannot be redeclared and must be declared before use whereas variables declared with var keyword are hoisted. An example will clarify the difference even better
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