'slice()' and 'splice()' are both methods used to manipulate arrays in JavaScript, but they have different purposes.
'slice()' is a method that returns a shallow copy of a portion of an array into a new array object selected from 'begin' to 'end' ('end' not included).
The original array will not be modified.
'splice()' is a method that changes the contents of an array by removing or replacing existing elements and/or adding new elements in place.
It returns an array containing the deleted elements, or an empty array if no elements were deleted.
'slice()' is commonly used to create a new array containing a subset of the original array, without modifying the original array.
'splice()' is commonly used to add or remove elements from an array, modifying the original array in place.
Overall, 'slice()' is used for extracting a portion of an array, while 'splice()' is used for adding or removing elements from an array.