If you need any of these characters as part of your text you must precede all
but the tilde and vertical bar with a \ (backslash) or TeX will interpret them
as a TeX command. To print a tilde you must enter \tilde and for a vertical bar
enter \vbar.
For example, the following input:
Mom sent Tommy to the store and told him to buy 5\# potatoes, a
half gallon of 2\% milk and two packages of M\&Ms.
would result in:
Mom sent Tommy to the store and told him to buy 5# potatoes, a half gallon of
2% milk and two packages of M&Ms.