Greetings overflowers,

I'm trying to write a regular expression to validate phone numbers of the form ########## (10 digits)
i.e. this is these are cases that would be valid: 1231231234 or 1111111111. Invalid cases would be strings of digits that are less than 10 digits or more than 10 digits.

The expression that I have so far is this:
d{10}

Unfortunately, it does not properly validate if the string is 11+ digits long.

Does anyone know of an expression to achieve this task?