prompt ( prompt )
prompt ( prompt , default_expr)

returns string_expression

This function displays a message box with an input box and returns a string value of what the user typed in the box. You may set the default value by setting a second string argument.

a$ = prompt("What state do you live?","KY")
if a$ = "KY" then
   print "Kentucky."
else
   print "Somewhere Else"
end if

draws