Additional exercises to `console`

[Lensco825]

I'd like to add more information about console (ex: console.table, console.error) this would be great to add for other to know that console.log isn't the only thing you can do.

May you assign this to me and add the "Hacktoberfest" label to this and any other issue I make? Thank you very much.

[Lensco825]

Should I make separate pull requests for the 3 issues I made or should I put them all together @sumn2u?

[sumn2u]

Would suggest to create separate PRs for each issue.

[Lensco825]

I've changed this from additional explanation to additional exercises since we would probably have to make a document or page about the console for that to do well. Instead, I'll add exercises on doing math and using strings in console.