Is there a way to write absolute value bars when asking a question? I looked through the list of symbols given on the website, but I didn't see anything.
You can use the abs(x) function.
To write absolute value bars, use abs function with the hashtags.
When you write ＃abs(x)＃ in the Answer section(＃ must be written in half-width character), you actually see
Alternatively, you can...
... write something like
- without hashtags
- with hashtags
to get the same result. So just use the vertical bar symbol located on your keyboard to get the absolute value bars in between hashtags.