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Add, remove, or style elements in real time using JS.
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Arrays store multiple values inside square brackets, like [1,2,3].
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array.length tells how many elements are in an array.
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array.push("new") adds an item at the end.
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array.pop() deletes the last item from an array.
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array.shift() takes the first item out.
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array.unshift("start") adds a new first element.
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Finds where a value is located inside an array.
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array.includes("apple") returns true or false.