What exact role does JavaScript play in front-end web development?

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JavaScript allows users to interact with web pages. It allows us to add dynamic behavior to the webpage and add special effects to the webpage. Here are few examples of things you can do with JavaScript on a web page: Show or hide more information with the click of a button.
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What is an Array?

An array is a collection of (same or different type of) items.In Java and C#, etc., the elements inside the array should be of the same type (e.g. ) while in languages like JavaScript and Python. The elements can be different types also(e.g. )
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