What is the regular expression for this input?

Question

User1158330421 posted

The regular expression takes this input:

"SJDC-12345678912345678"

Basically, it's 4 characters followed by "-" and then 16 numbers 

Answer 1

User475983607 posted

The sample does not match the requirement.

This

^[A-Z]{4}-[1-9]{16}$

matches 

SJDC-1234567891234567

https://regex101.com/

Answer 2

User-1171043462 posted

Try this

^[A-Z]{4}-[\d]{16}$