Question

I need a regular expression for a password to fulfill the following requirements:

• It must be at least 6 characters long
• There must be 1 numeric character
• The first and last character must be an alphabetic character
• No special characters

I’ve found some expressions that come close to this, but none that match what I need.
Any help you can provide would be greatly appreciated.

I’ve tried this but it doesn’t quite fit the bill:

^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$

Answer 1

• Assert that a string has 6 or more characters:

  (?=.{6,})

• Assert that a string has at least 1 numeric character:

  (?=.*\d)

• Match an alphabetic character in the first and last position:

  ^[A-Za-z].*[A-Za-z]$

Combining all of the above, yields the following final expression:

(?=.{6,})(?=.*\d)[A-Za-z][A-Za-z0-9]*[A-Za-z]