The pound sign will appear as # in Latin script and indicates that what follows is should be read as a number in some series.
May also be referred to as a hash
especially in computing circles or outside of North America or number sign
Referring to a pound sign as a hashtag
will probably, rightly or wrongly (but probably rightly) give cause for adults to think you are a child.
To access your bank account, please press the pound sign, followed by your PIN number.