Names for the number 0 in English such as 2-2, while null is used for an undefined states (for example a memory location that has not been explicitly initiated). Sporting terms (see above) are sometimes used as slang terms for zero as are "nada", "zilch" and "zip". "Zilch" is a slang term for zero, and it can also mean "nothing". The origin of the term is unknown. Names for the number 0 in English Zero is the usual name for the number 0 in English. In British English "nought" is also used. In American English "naught" is used occasionally for zero, but as with British English, "naught"
Old English eth is replaced by thorn). In contrast with Modern English orthography, that of Old English was reasonably regular, with a mostly predictable correspondence between letters and phonemes. There were not usually any silent letters—in the word "cniht", for example, both the and were pronounced, unlike the and in the modern "knight". The following table lists the Old English letters and digraphs together with the phonemes they represent, using the same notation as in the Phonology section above. Doubled consonants are geminated; the geminate fricatives /, and cannot be voiced. Old English literature, though more abundant than literature of the continent