Get Setting / Option Value in Vim

Today I was trying to figure out whether or not I had the smartindent setting on in Vim, and could not remember the easiest way to check this. It took me a surprisingly/annoyingly long amount of time to figure out how to do this on Google.

To view the value of a setting, like smartindent, simply do: :echo &smartindent 1 Now toggle, and you see the change: :set nosmartindent :echo &smartindent 0