Question

I want to validate an input of format “AB1234” where first two characters must be Alpha (A-Z) and remaining must be numbers.
My current regex is validating the input “AB123A” which is incorrect. What is missing my current regex?

^[a-zA-Z]{2}\d{1,6}

Answer 1

You are missing $ which specifies the end of the string

^[a-zA-Z]{2}\d{1,6}$

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^[a-zA-Z]{2}\d{1,6} without $ matches AB123A since you are not specifying any end to that string..

It matches AB123 within AB123A