Basic javascript functions

javascript functions are fundamental building blocks that encapsulate reusable code, allowing developers to execute a set of instructions whenever needed. functions can accept inputs, referred to as parameters, and can return outputs, making them versatile for various tasks. they can be defined in several ways, including function declarations, expressions, and arrow functions. scope is an important concept, determining the accessibility of variables within functions. javascript also supports higher-order functions, which can take other functions as arguments or return them, enabling powerful programming paradigms such as callbacks and functional programming. functions can be invoked in different contexts, affecting the value of the `this` keyword, which refers to the calling object. additionally, functions can have default parameters and rest parameters, enhancing their flexibility. overall, understanding functions is crucial for effective javascript programming, enabling better code organization, modularity, and reusability.
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