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 phonology well, and was best considered an allophone of , occurring only after a nasal or when geminated. But after became word-initially in Old English, it makes sense to consider the stop the basic form and the fricative the allophone. The evidence for the allophone after front vowels is indirect, as it is not indicated in the orthography. Nevertheless, the fact that there was historically a fronting of to and of to after front vowels makes it very likely. Moreover, in late Middle English, sometimes became (e.g. "tough", "cough"), but only after back vowels, never after front vowels. This is explained