Although "slash" is most often used to describe the forward slash, it can describe either a forward slash or backslash. It's better to say "backslash" or "whack" instead of "slash" when telling someone to enter a backslash.
Early typewriters and computer keyboards only had a forward slash. The backward slash was not made popular until MS-DOS started being used.
Where is the backslash key on the keyboard?
How to create a backslash
Creating the \ symbol on a U.S. keyboard
Creating the \ symbol on a smartphone or tablet
What is a backslash used for on a computer?
A backslash can represent a file path in MS-DOS and Windows. For example, c:\windows is an example of the backslash being used. A backslash may also be used for any of the following reasons.
- The backslash is used as an escape character.
- A file and directory separator in a file path.
- A networked computer or folder in a network path.