What's the matter with a minus sign before the absolute value sign? For example: | 56 | =? If it is | + π | =? Thank you!

What's the matter with a minus sign before the absolute value sign? For example: | 56 | =? If it is | + π | =? Thank you!

-|56|=-56
|+π|=π
If this happens, we usually calculate the value inside the absolute value first, and then calculate the value outside the absolute value
For example, if a > 0, | a | = - A
If a