The forward slash
First up, there are forward and there are backward slashes. The direction is determined by starting at the bottom of the stroke and seeing whether it goes to the right (forwards) or the left (backwards) as you go up to the top.
There are a few names for this punctuation mark - solidus, virgule, diagonal.
The forward slash is used in many situations
Click here to move on to the next topic: To indicate choice between multiple options