Regex number and hyphen

Question

I\'m trying to match number with regular expression like:

34-7878-3523-4233

with this:

^[0-9][0-9-]*-[0-9-]*[0-9]$
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Answer 1

Your regex:

See it in action: Regexr.com

^[0-9]+(-[0-9]+)+$

Matches:

1-2
1-2-3

Doesn't match:

1
1-
1-2-
1-2----3
1---3

Answer 2

Use the normal*(special normal*)* pattern:

^[0-9]+(-[0-9]+)+$

where normal is [0-9] and special is -

Answer 3

That's because, you have included the hyphen in the allowed characters in your character class. You should have it outside.

You can try something like this: -

^([0-9]+-)*[0-9]+$

Now this will match 0 or more repetition of some digits followed by a hyphen. Then one or more digits at the end.