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JavaScript Function Types Explained: Declaration, Expression, Arrow, Anonymous

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JavaScript functions are reusable blocks of code designed to perform specific tasks, avoiding repetitive coding. Common types include function declarations, which use the 'function' keyword, and function expressions, where a function is assigned to a variable. Arrow functions offer a more concise syntax and are often used with array methods like map() and filter(). Anonymous functions, lacking a name, are frequently employed as callbacks. These various function types aid in code organization, reuse, and maintenance.

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