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  1. W3School
    https://www.w3schools.com › js › js_functions.asp

    JavaScript Functions - W3Schools

    • A JavaScript function is defined with the function keyword, followed by a name, followed by parentheses (). Function names can contain letters, digits, underscores, and dollar signs (same rules as var… See more

    Function Invocation

    The code inside the function will execute when "something" invokes(calls) the … See more

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    Function Return

    When JavaScript reaches a returnstatement, the function will stop executing. If the function was invoked from a statement, JavaScript will "return" to execute th… See more

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    The () Operator

    The () operator invokes (calls) the function: Accessing a function with incorrect parameters can return an incorrect answer: Accessing a function without () returns the function an… See more

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    What are the components of a JavaScript function definition?
    To define a function, you must use the function keyword, followed by a name, followed by parentheses ( ). JavaScript functions are reusable blocks of code that perform a specific task, taking some form of input and returning an output.
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