What are built-in objects in javascript

To solve different kinds of problems, JavaScript provides various built-in objects. Each object contains properties and methods. Some of the built-in objects in Javascript are: Array Date Math String Number Array object:  The properties available on Array object are: Property Description length Returns the number of elements in the array constructor Returns the function that created the array object prototype Allows us to add properties and methods to an array object Methods available on Array object are: Method Description reverse() Reverses the array elements concat() Joins two or more arrays sort() Sort the elements of an array push() Appends one

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What are built-in objects in javascript
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