The interrobang is a rarely used, nonstandard English-language punctuation mark intended to combine the functions of a question mark and an exclamation mark. The typographical character resembles those marks superimposed one over the other, and the name interrobang comes from interro - from interrogative - and bang - used to amplify the exclamation. In informal writing, the same effect is achieved by placing the exclamation point after or before the question mark; e.g., "How could you do such a thing!?"