Commenting out
Switching off a piece of code by changing it into a comment. You do this instead of deleting your code because you might want it again later, or it might not be the problem you are looking for (in which case you can switch it back on)
Switching off a piece of code by changing it into a comment. You do this instead of deleting your code because you might want it again later, or it might not be the problem you are looking for (in which case you can switch it back on)