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I want to make a regular expression test an employee id number when they enter it into a prompt. The format is as follows
AXXXXXX
each X represents a number from 0 – 9. The first character, “A” is a constant and is the only string character the user can input (can be lowercase or uppercase A). I want it to test this particular pattern and return a message if the user does not type it properly. I know how to do all the valdation stuff, but am confused on how to create the regular expression to test this.