Letter Combinations of a Phone Number
Explore how to convert phone number digits into all possible letter combinations by understanding the mapping of digits 2 to 9 to letters. Learn to implement efficient algorithms that generate subsets of letters, practicing your problem-solving skills in JavaScript to handle constraints and edge cases.
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Statement
Given a string containing digits from 2 to 9 inclusive, with the possibility of each digit appearing multiple times, return all possible letter combinations that the number could represent. Return the answer in any order.
The illustration below shows the mapping of digits to letters in a telephone dial pad.
Note: The number on the telephone dial pad does not correspond to any ...