FreeCodeCamp
JavaScript Algorithms and Data Structures Project

Telephone Number Validator

Check if the passed string looks like a valid US phone number.
The user may fill out the form field any way they choose as long as it has the format of a valid US number. The following are examples of valid formats for US numbers: 

555-555-5555
(555)555-5555
(555) 555-5555
555 555 5555
5555555555
1 555 555 5555


Output Will Appear Here