pound key

pound key

pound key
pound key

Nummertecken, namn på tecknet #. Kallas även brädgård, gärdsgård, stege, staket, fyrkant, vedstapel, haga, stockhög, grind, fyrtagg, pound, eller hashmark (från engelskan). Nummertecknet har ASCII-koden 35 (0x23 hexadecimalt), och i Unicode har det kodpunkten U+0023. På sociala medier har tecknet en kategoriserande funktion när det används tillsammans med ett sökord/tagg. Detta blir då en hashtag eller hashtagg.[1]

Moderna telefoner har knappsatser med bland annat ett nummertecken, som i detta sammanhang kallas fyrkant. Det används för att skicka ickenumeriska kommandon till telefonväxlar. Ofta används nummertecknet för att avsluta nummersekvenser som matats in.

Ett liknande tecken (♯) används i notskrift, där det kallas korsförtecken eller bara kors, för att markera ett halvt tonstegs höjning av noters normala tonvärden. Placerat i vänstermarginalen är det ett fast tecken (gäller alla noter på samma notlinje notraden ut), medan tillfälligt tecken är placerat omedelbart till vänster om en enskild ton, som då avviker från gällande tonart.

Korsförtecknet har en särskild placering i Unicode-uppsättningen: U+266F (Music Sharp Sign).
I regel har korsförtecknet, ♯ , mer lutande vågräta linjer än nummertecknet, #. Korsförtecknet behöver synas mot de vågräta notskriftslinjerna.

Symboliserar oftast brädgård.

pound key

Nummertecknet används i många programspråk som inledningen till en radslutskommentar. Programspråkets kompilator eller interpretator ignorerar då samtliga tecken inklusive nummertecknet fram till nästa radslut. I shellscriptet nedan används ett nummertecken för att kommentera ut en del av raden:

I Unixmiljöer har tvåteckenssekvensen ‘#!’ (nummertecken åtföljt av utropstecken) en särskild betydelse om den förekommer som de allra första tecknen i en exekverbar fil. Operativsystemet tolkar då strängen som följer teckensekvensen som namnet på det program som bör användas för att interpretera resten av filen. Exemplet ovan kan kompletteras för att uttrycka att det scriptet är avsett att exekveras av standardprogrammet ‘/bin/sh’:

Märk att när /bin/sh startar och börjar läsa scriptet tolkas hela den första raden som en kommentar. Eftersom teckensekvensen först kom att användas i samband med shellscript kallas den ibland shebang, en sammanslagning av engelska orden shell och bang (det senare ett vanligt engelskt alternativnamn för utropstecken). Den kallas också hash-bang, där hash är ett engelskt namn för #.

I programspråket C och dess efterföljare C++ och C# tolkas ett nummertecken som första icke-blanka tecken på en rad som början av ett preprocessordirektiv, som till exempel #include- eller #if-direktiven.

I amerikansk engelska kan tecknet # används i betydelsen nummer. Exempelvis #5 läses som nummer fem.

I brittisk och australiensisk engelska kallas nummertecknet hash. Amerikansk engelska betecknar tecknet pound sign och används ofta i USA som förkortning för viktenheten pound(s) (“pund”), men bara om tecknet förekommer efter ett tal. “23#” utläses alltså “23 pounds” men “#23” utläses “number 23”. Dessutom används pound sign om tangenten # på telefoner, som man kan uppmanas att trycka på om man ringer till USA. Detta gäller i viss mån i Kanada också. I resten av världen betyder “pundtecken” tecknet ‘£’.

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  • På sociala medier används nummertecknet för att kategorisera inlägg och göra dem sökbara genom att lägga till ett nummertecken följt av ett sökord i inlägget, till exempel #politik, #semester. Nummertecknet kallas då i kombination med ett sökord för hashtag.

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    pound key

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    The symbol # is known variously in English-speaking regions as the number sign,[1] hash,[2] or pound sign.[3] The symbol has historically been used for a wide range of purposes including the designation of an ordinal number and as a ligatured abbreviation for pounds avoirdupois – having been derived from the now-rare ℔.[4]

    Since 2007, widespread usage of the symbol to introduce metadata tags on social media platforms has led to such tags being known as “hashtags”,[5] and from that, the symbol itself is sometimes called a hashtag.[6]

    The symbol is distinguished from similar symbols by its combination of level horizontal strokes and right-tilting vertical strokes.

    It is believed that the symbol traces its origins to the symbol ℔,[a] an abbreviation of the Roman term libra pondo, which translates as “pound weight”.[7][8] This abbreviation was printed with a dedicated ligature type, with a horizontal line across, so that the lowercase letter l would not be mistaken for the numeral 1. Ultimately, the symbol was reduced for clarity as an overlay of two horizontal strokes “=” across two slash-like strokes “//”.[8] Examples of it being used to indicate pounds exist at least as far back as 1850.[9][b]

    The symbol is described as the “number” character in an 1853 treatise on bookkeeping,[10] and its double meaning is described in a bookkeeping text from 1880.[11] The instruction manual of the Blickensderfer model 5 typewriter (c. 1896) appears to refer to the symbol as the “number mark”.[12] Some early-20th-century U.S. sources refer to it as the “number sign”,[13] although this could also refer to the numero sign.[14] A 1917 manual distinguishes between two uses of the sign: “number (written before a figure)” and “pounds (written after a figure)”.[15] The use of the phrase “pound sign” to refer to this symbol is found from 1932 in U.S. usage.[16]
    The term hash sign is found in South African writings from the late 1960s[17] and from other non-North-American sources in the 1970s.[citation needed]
    pound key

    The symbol appears to have been used primarily in handwritten material; in the printing business, the numero symbol (№) and barred-lb (℔) are used for “number” and “pounds” respectively.[where?][citation needed]

    For mechanical devices, the symbol appeared on the keyboard of the Remington Standard typewriter (c. 1886)[18] but was not used on the keyboards used for typesetting.[9] It appeared in many of the early teleprinter codes and from there was copied to ASCII, which made it available on computers and thus caused many more uses to be found for the character. The symbol was introduced on the bottom right button of touch-tone keypads in 1968, but that button was not extensively used until the advent of large scale voicemail (PBX systems, etc.) in the early 1980s.[19]

    One of the uses in computers was to label the following text as having a different interpretation (such as a command or a comment) from the rest of the text. It was adopted for use within internet relay chat (IRC) networks circa 1988 to label groups and topics.[20] This usage inspired[21] Chris Messina to propose a similar system to be used on Twitter to tag topics of interest on the microblogging network;[22] this became known as a hashtag. Although used initially and most popularly on Twitter, hashtag use has extended to other social media sites.[23]


    When # prefixes a number, it is read as “number”. A “#2 pencil”, for example, indicates “a number-two pencil”. The abbreviations ‘No.’ and ‘№’ are used commonly and interchangeably.

    When # is after a number, it is read as “pound” or “pounds”, meaning the unit of weight. The text “5# bag of flour” would mean “five pound bag of flour”. The abbreviations ‘lb.’ and ‘℔’ are used commonly and interchangeably. But it is not a replacement for ‘£’.

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  • The latter usage is rare outside North America. The sign is not used to denote pounds as weight (lb or lbs is used for this), and certainly not for pounds currency. The use of # as an abbreviation for “number” is however common in informal writing, but use in print is rare.[44] Where Americans might write “Symphony #5”, British and Irish people are more likely to write “Symphony No. 5”.[citation needed] British typewriters had a £ key where American typewriters had a # key.[45] Many computer and teleprinter codes (such as BS 4730 (the UK national variant of the ISO/IEC 646 character set) substituted ‘£’ for ‘#’ to make the British versions, thus it was common for the same binary code to display as # on US equipment and £ on British equipment. (‘$’ was not substituted due to obvious problems if an attempt was made to communicate monetary values.)

    In Unicode, several # characters are assigned. Other attested names in Unicode are: pound sign, hash, crosshatch, octothorpe.



    At least three orthographically distinct number signs from other languages are also assigned:

    On the standard US keyboard layout, the # symbol is ⇧ Shift+3. On standard UK and some other European keyboards, the same keystrokes produce the pound (sterling) sign, £ symbol, and # may be moved to a separate key above the right shift key. If there is no key, the symbol can be produced on Windows with Alt+35, on Mac OS with ⌥ Opt+3, and on Linux with Compose++.



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    Cite this Entry

    “Pound key.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pound%20key. Accessed 2 Sep. 2021.

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    Definition and synonyms of pound key from the online English dictionary from Macmillan Education.

    This is the British English definition of pound key.View American English definition of pound key.

    Change your default dictionary to American English.


    View the pronunciation for pound key.

    pound key
    pound key
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