Valid Phone Numbers LeetCode Solution

Problem – Valid Phone Numbers LeetCode Solution

Given a text file file.txt that contains a list of phone numbers (one per line), write a one-liner bash script to print all valid phone numbers.

You may assume that a valid phone number must appear in one of the following two formats: (xxx) xxx-xxxx or xxx-xxx-xxxx. (x means a digit)

You may also assume each line in the text file must not contain leading or trailing white spaces.

Example:

Assume that file.txt has the following content:

987-123-4567
123 456 7890
(123) 456-7890

Your script should output the following valid phone numbers:

987-123-4567
(123) 456-7890

Valid Phone Numbers LeetCode Solution in Bash

egrep "^(\([0-9]{3}\) |[0-9]{3}\-)[0-9]{3}\-[0-9]{4}$" file.txt
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This Problem is intended for audiences of all experiences who are interested in learning about Data Science in a business context; there are no prerequisites.

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