What are jQuery Selectors? Explain them?

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A Selector identifies an HTML element tag that is used to manipulate with jQuery code.
Selectors allow page elements to be selected. $ is the symbol used for it.and $ can also be called as jQuery selector. Selectors are the most important part of the jQuery , we can say that heart of jQuery. 
We can select single (using id selectors) or multiple elements using class or element selectors 
Selectors find DOM Elements to manipulate based on CSS Selector syntax
Selectors can find the elements by ID, class, Element Name and hierarchical positioning
Selectors can return sequence of DOM elements , and we can use methods or logic on every matched element.

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What are jQuery Selectors? Explain them?

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