combining 2 regex into one

Question

I want a regex that will: - check the first 2 characters equal 04 - check the length is 10 and contains numbers

I have this, and tried numberous things but couldn't find how to combine the 2 in one using a 'and' or if I have the first check even right...

pattern = "(04{1,1})/([0-9]{10,10})"

Answer 1

You can use the following

/^04[0-9]{8}$/