CODEWITHSUNDEEP
regex
M.Maria
M.Maria

Reputation: 111

Regex pattern to match a string like : +500-+600

I'm trying to write a regex pattern to match strings like:

+500-+600

The pattern should only accept + when there is a number after, and should only accept - (hyphen) between two numbers.

So far I could only get the pattern working for the + which is:

/^\+?([0-9]+)$/

But I couldn't figure out how to add the - to the pattern.

Any thoughts?

Thank you

Upvotes: 0

Views: 247

Answers (1)

BadHorsie
BadHorsie

Reputation: 14564

+ is a special character in regex, so you must escape it with \ if you want to interpret it as a string literal.

/^\+\d+-\+\d+$/

This will match all strings where you have two numbers separated by a hyphen (as per your example +500-+600).

If the second number is optional but there can only be two numbers, use this:

/^\+\d+(-\+\d+)?$/

This matches:

+500
+500-+600

If there can be any number of additional hyphen-separated numbers, use this:

/^\+\d+(-\+\d+)*$/

This matches:

+500
+500-+600
+500-+600-+700

Upvotes: 1

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