JavaScript Functions Explained: From Basics to Arrow Functions

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A function in JavaScript is a reusable block of code defined once and invoked as needed using its name followed by parentheses. Functions can accept parameters, allowing different inputs to be passed as arguments each time they are called. They can also return values, making them useful for computations such as adding two numbers. Beyond standard declarations, JavaScript supports function expressions, where a function is assigned to a variable. Arrow functions offer a more concise syntax, especially when the function body contains a single return statement.

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