Half-width yen-mark ¥ and backslash \
Although the display is different, they have the same meaning on the program.
¥ is the yen mark. The first letter of Yen is added a double line to (It resembles a $ dollar sign.)
The ¥ mark can be used on a computer only when the input characters are specified in the Japanese environment in the software.
On Japanese keyboards, there is a ¥ in the upper right corner.
In an English environment, the same place on the keyboard is a backslash ( \ ).
In this LASBOS Moodle, half-width alphabets are in English environment, so please note that half-width ¥ (← entered in full-width) is not displayed and becomes \.