Regex pattern containing know length integer and unknown length integer

Question

I need a regex pattern to find a number like: 1234567-4

• Seven Digit Integer
• Followed by a dash
• Followed by an integer of any length

Thanks in advance!

Answer 1

If the first digit can not be 0

[1-9]\d{6}-\d+

if the first digit can be 0

\d{7}-\d+

Answer 2

Depending on the language you're using, this ought to do it:

^\d{7}-\d+$

Example and explanation: http://regex101.com/r/jM0bN5/1