Regular expressions, how to check for a number from 1 to 12?

Question

Regular Expressions

Hello.
there is this: /^[1-9]$/, but I need to check that there is only one digit and it is from 1 to 12. How can I do this?)
Thank you!

Answer 1

^([1-9]|1[0-2])$
https://regex101.com/r/r8FC3E/1

Answer 2

Monsieur, checking the range of a number through a regular expression is such an idea. Why not use if?