Slice vs substring method string object in javascript

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in javascript, both the `slice` and `substring` methods are used to extract portions of a string, but they differ in their functionality and usage. the `slice` method takes two parameters: the starting index and the ending index (exclusive), allowing for negative indices, which count from the end of the string. this flexibility makes it useful for various scenarios, such as extracting parts of the string without worrying about its length.

on the other hand, the `substring` method also takes two parameters but treats them differently: if the starting index is greater than the ending index, it swaps them. additionally, `substring` does not support negative indices, which can limit its use in certain situations. overall, while both methods achieve similar results, the choice between them often depends on the specific requirements of the task and the behavior desired in handling indices.
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