opening interjections: comma after yes, no, oh, and well

The comma after yes, no, oh, and well.

When yes, no, oh, or well opens a sentence, follow it with a comma: Yes, I filed it. Well, start again.

Examples

UseNo, the key is missing. (comma after the opening word)

UseWell, try the spare. (comma after the opening word)

AvoidNo the key is missing. (no comma after the opening word)