Does “ - ” mean stdout in bash?

Question

Is \" - \" a shortcut for stdout in bash? If not what does it mean? For example,

wget -q -O - $line 

How about stdin?

Thanks and re

Answer 1

- is not special in bash, it is simply given as a parameter to the program. Then it depends on the program how it interprets that -.

Commonly it denotes that stdin or stdout should be used, depending on context.