Within this same function, I am also trying to have it loop until the user inputs the correct phone number.

Here is what I have so far: This functions purpose is when the user selects 'A'(add) from the menu and then takes you to other functions.

validating phone number-28

Regular expressions are more powerful and flexible. You can search Numbers, punctuation characters, patterns and so on.

At the same time, Regular expression can be very confusing and tricky.

If you know that our rule is wrong, or can add more validation to make this npm more accurate.

With only a phone number and/or a country entered, Global Phone Verification can determine whether the phone number is valid for the region and identify the country of origin from the international access code.

A valid mobile number is a ten digit number starting with a .

Regular expressions are a key concept in any programming language.

A quick explanation with Python examples is available here.

You could also go through the link below to read more about regular expressions in Python.

I've always wanted to know more about the Data Validation setting in Google Forms, and yesterday, thanks to a participant question and a Google search, I learned how to make sure phone numbers in forms are entered in a consistent format, in this case, ###-###-####.