<ul><li>JavaScript is a dynamic, loosely-typed language that allows variables to change type at runtime.</li><li>Variables in JavaScript are containers for storing data values and can be declared using var, let, or const.</li><li>JavaScript has different data types including primitive types (string, number, boolean, null, undefined, symbol, and bigint) and reference types (object, array, and function).</li><li>Type coercion and type checking are important concepts in JavaScript to handle data type conversions and check variable types.</li></ul>

Understanding Variables and Data Types in JavaScript

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