Where did the phrase and how originate?

The phrase "and how" is believed to have originated in American English in the early 20th century, often used to emphasize a statement or express strong agreement. It likely derives from the colloquial use of "how" to ask for confirmation or intensity regarding a particular situation. Over time, it has evolved into a rhetorical device to reinforce a point or convey enthusiasm. Its usage has become more common in informal speech, particularly in the context of expressing affirmation.