A question mark
is a punctuation
mark or, more pedantically, a tone mark. It is a full stop, like a period
used in interrogatory sentences, such as "Where did you get that hat?" In US English it is also called a query
The symbol is generally thought to originate from the Latin quæstio, meaning question, which was abbreviated to 'Qo', which was transformed into the symbol.
In some languages, most notably Spanish, a sentence (or sometimes a phrase) ending in an question mark must also begin with an inverted question mark, ¿.
See also: exclamation mark, full stop
In computer programming
, the question mark
corresponds to Unicode
and ASCII character
63, or 0x003F
For the rock music band, see ? & the Mysterians