"Zero" is the usual name for the number 0 in English. In British English "nought" is also used.
It is not only followed in America but also in Britain for a simple reason that it is easier to say “O” rather than “zero”. It also flows easily while reciting a number, “O” has a single syllable whereas “zero” has two. That's American for you!
The standard way of telling a letter O from a number 0 in handwriting is to put a slash through the number. If you're writing a question or answer it is the "Preformatted text" button (looks like { } ). Or you can just indent the line 4 spaces. To make some inline c0d3 surround the text with backticks (``).
In Australia, it is popular to interchange "zero" for "o" when stating a phone number.
“In British English, zero is normally used only in scientific writing. In conversation, British speakers usually say 'nought,' or to a lesser degree, 'oh. '”
However, in spoken English, the number 0 is often read as the letter "o" ("oh"). For example, when dictating a telephone number, the series of digits "1070" may be spoken as "one zero seven zero" or as "one oh seven oh", even though the letter "O" on the telephone keypad in fact corresponds to the digit 6.
Macron (pronounced /mā-ˌkrän/): ā, ē, ī, ō
A macron is a straight line ( − ) that is placed over a vowel. This symbol gives a vowel a long sound.
The most common pronunciation for the letter OO is the sound [u]. This happens in words like 'zoo', 'food', 'moon', 'loop'. OO.
Ö, or ö, is a character that represents either a letter from several extended Latin alphabets, or the letter "o" modified with an umlaut or diaeresis. In many languages, the letter "ö", or the "o" modified with an umlaut, is used to denote the close- or open-mid front rounded vowels [ø] ( listen) or [œ] ( listen).
At the end of an open syllable, u makes the long u sound (says its name) and this is one of the most common ways of spelling the long u sound. Some examples include pupil, tulip, and student. It can make either the /oo/ or the /y/ /oo/ sound.
In short, the British pronounce “Z” as /zɛd/ (zed) whereas Americans pronounce it as /ziː/ (zee).
The first known English use of zero was in 1598. The Italian mathematician Fibonacci (c. 1170–1250), who grew up in North Africa and is credited with introducing the decimal system to Europe, used the term zephyrum. This became zefiro in Italian, and was then contracted to zero in Venetian.
A 00 (typically read "double O" and denoted in Fleming's novels by the letters OO rather than the digits 00) is a field agent who holds a licence to kill in the field, at their discretion, to complete any mission.
Ö or ö is not a letter used in English, but is used in some other languages, such as German, Finnish, Estonian, Hungarian, Turkish, Swedish and Icelandic.
The slashed zero glyph is often used to distinguish the digit "zero" ("0") from the Latin script letter "O" anywhere that the distinction needs emphasis, particularly in encoding systems, scientific and engineering applications, computer programming (such as software development), and telecommunications.
The set Ø = { } is the empty set containing no elements. The set ℕ = {0, 1, 2, 3, 4, … } is the set of all natural numbers. We treat 0 as a natural number.
"Õ", or "õ" is a composition of the Latin letter O with the diacritic mark tilde.