What Does @ Mean?
What Does @ Mean?
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In Swift, @ prefixes "annotations" which can be placed on courses or users. Annotations inform the compiler to use Particular semantics into the declaration like keywords, with no introducing keyword phrases for the language.
In (In particular English) scientific and complex literature, @ is made use of to describe the situations beneath which information are legitimate or a measurement has long been designed.
whatever the precise origin of the symbol, we now tend to be more informed about the “industrial at” because of technologies.
Ray Tomlinson 1st utilized the “at” image to structure an e-mail address making use of ARPAnet in 1971 for just a concept he despatched to himself from one Personal computer to a different to check the program, and amusingly, he's consistently been quoted as declaring he doesn't recall exactly what the concept said—it was just some forgettable check concept—for the reason that he failed to Feel it had been a giant deal at enough time.
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the truth is, the extremely earliest information that comprise @ or similar shapes did not utilize them to symbolize a preposition. the very first known use with the image in its common business feeling is within a 1536 Spanish-language letter from the Florentine merchant. It stood to get a unit of quantity, arroba
Held nowadays while in the Vatican Apostolic Library, it attributes the @ image instead of the capital letter alpha "Α" as an Original inside the word Amen; even so, The key reason why guiding it getting used in this context remains unidentified. The evolution of your image as used today will not be recorded.
In Dutch, it is called apenstaart ('monkey's tail'). The a is the first character in the Dutch phrase aap which suggests 'monkey' or 'ape'; apen may be the plural of aap. However, using the English at is becoming significantly preferred in Dutch.
In many languages other than English, Even though most typewriters included the symbol, using @ was less prevalent before e-mail turned widespread inside the mid-nineteen nineties.
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, “just one-fourth”), which represented the potential of a typical amphora, a vessel utilized to shop and transport liquids, cereals, and other items. This use on the image was so popular in Mediterranean trade that it is however identified as arroba
In up to date English usage, @ is really a industrial image, indicating at and at the rate of or at the price of. it's got seldom been Employed in economic ledgers, and is not used in normal typography.[12]
. simply because there's no other successful way to put in writing an email deal with, the at signal could possibly be Employed in formal producing when mentioning anyone’s e mail handle.
within a Windows Batch file, an @ In the beginning get more info of the line suppresses the echoing of that command. In other words, is the same as ECHO OFF placed on The present line only. Ordinarily a Windows command is executed and requires result from the following line onward, but @ is really a rare illustration of a command that normally takes effect instantly.
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