• February 17, 2025
How Can We Generate Letter Combinations from a Phone Number?

When you think of a phone number, you likely think of digits, but there’s a fascinating connection to the alphabet that many people might overlook. Traditional phone keypads associate numbers with letters. For example, the number 2 corresponds to the letters A, B, and C, while 3 corresponds to D, E, and F. This association allows us to generate letter combinations from the digits of a phone number, and it’s a common question in technical interviews, particularly in programming roles.