Simple regex that matches x or x+y

Question

I'm trying to validate an input field to accept x OR x+y where x and y are whole numbers from 1-10. Which regular expression matches this? This is to be used with custom jQuery validation.

Examples

• 4: OK
• 5+1: OK
• 0: Not OK
• 0-9: Not OK
• 1+11: Not OK

Answer 1

This should do it (assuming your "1-10" was inclusive of both ends):

^([1-9]|10)(\+([1-9]|10))?$

http://rentzsch.github.com/JSRegexTeststand/ is your friend here.

Answer 2

This one should do the trick

/^([1-9]|10)(\+([1-9]|10)){0,1}$/