Hi, while testing the program (runs in DOS), I thought "if someone hits enter without typing a letter before, what happens?"

I tested and the script ends.. Is this normal, or how can I avoid this?

[CODE=perl]print "To which analytical division is the study belonging to?\n\n";
print "\ti: Immunology\n";
print "\tc: Chemistry\n";
print "\tq: Quit\n";...