The page states that A dash over the final digit indicates that the decimal continues infinitely, or without ending. Such cases are referred to as repeating decimals.
I was taught to use a dot over the digit in question, although I appreciate that either usage is acceptable, possibly the dot is a British thing? However what this article doesn't make it clear what the situation is with regard to repeating decimals with more than one digit repeated. - such as 1/11 = 0.0909090909...
The way I was taught was to place a dot at each end of the repeated section ... but I'm not sure what the generally accepted approach is? BryanT 08:15, 5 January 2009 (EST)