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+ and & operatorsWhat is the difference between "+" and "&" operator when joining strings?
Thanx! "Domac" <d*@dd.cc> schrieb: Did you already read the documentation on these operators?> What is the difference between "+" and "&" operator when joining strings? -- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://classicvb.org/petition/> On Thu, 29 Jun 2006 13:51:07 +0200 Domac <d*@dd.cc> wrote:
> *From:* "Domac" <d*@dd.cc> Not much difference when joining two real strings.> *Date:* Thu, 29 Jun 2006 13:51:07 +0200 > > What is the difference between "+" and "&" operator when joining > strings? > "aaa" + "bbb" would give the same result as "aaa" & "bbb" i.e. "aaabbb" However, if one expression is a number and one a string then things are less clear... "5" + 10 will give the number 15. The "5" is converted to a number "on the fly". Whereas "5" & 10 will give the string "510". The 10 is converted to a string "on the fly". + should really only be used to add numbers, and & should be used to concatenate strings. Excellent Answer.
Short, sweet, and most important a simple example. I didnt know why either, till i seen this post. Miro - Learning VB Net Show quoteHide quote "Ted Harrison" <t**@ntsx.co.uk> wrote in message news:memo.20060629131952.384B@ed.eddy.ed... > On Thu, 29 Jun 2006 13:51:07 +0200 Domac <d*@dd.cc> wrote: > >> *From:* "Domac" <d*@dd.cc> >> *Date:* Thu, 29 Jun 2006 13:51:07 +0200 >> >> What is the difference between "+" and "&" operator when joining >> strings? >> > > Not much difference when joining two real strings. > "aaa" + "bbb" would give the same result as "aaa" & "bbb" i.e. "aaabbb" > > However, if one expression is a number and one a string then things are > less clear... > > "5" + 10 will give the number 15. The "5" is converted to a number "on the > fly". > > Whereas "5" & 10 will give the string "510". The 10 is converted to a > string "on the fly". > > + should really only be used to add numbers, and & should be used to > concatenate strings. > Thanks a lot!
Show quoteHide quote "Domac" <d*@dd.cc> wrote in message news:un%23SQJ3mGHA.732@TK2MSFTNGP04.phx.gbl... > What is the difference between "+" and "&" operator when joining strings? > > > Thanx! > > > Domac wrote:
> What is the difference between "+" and "&" operator when joining strings? With "Option Strict On" - none at all.With "Option Strict Off" and joining only Strings - none at all. With "Option Strict Off" and joining Strings and /other/ data types - the effects can be "interesting" ... HTH, Phill W. Phill W. wrote:
> Domac wrote: Except that you can do += but not &=.> > What is the difference between "+" and "&" operator when joining strings? > > With "Option Strict On" - none at all. > > With "Option Strict Off" and joining only Strings - none at all. > > With "Option Strict Off" and joining Strings and /other/ data types - > the effects can be "interesting" ... > > HTH, > Phill W. B. I use &= in assignment statements all the time. For example:
strHTML &= MonthName(CInt(sMonth), False) & " - " & sYear & "</h3></center><br>" Hope this helps... Dick Show quoteHide quote "Brian Tkatch" <Maxwell_Sm***@ThePentagon.com> wrote in message news:1151593333.087137.67580@b68g2000cwa.googlegroups.com... > > Phill W. wrote: >> Domac wrote: >> > What is the difference between "+" and "&" operator when joining >> > strings? >> >> With "Option Strict On" - none at all. >> >> With "Option Strict Off" and joining only Strings - none at all. >> >> With "Option Strict Off" and joining Strings and /other/ data types - >> the effects can be "interesting" ... >> >> HTH, >> Phill W. > > Except that you can do += but not &=. > > B. > Dick Sutton wrote:
Show quoteHide quote > I use &= in assignment statements all the time. For example: OK, i see, my mistake. Thanks for the correction.> > strHTML &= MonthName(CInt(sMonth), False) & " - " & sYear & > "</h3></center><br>" > > Hope this helps... > > Dick > > "Brian Tkatch" <Maxwell_Sm***@ThePentagon.com> wrote in message > news:1151593333.087137.67580@b68g2000cwa.googlegroups.com... > > > > Phill W. wrote: > >> Domac wrote: > >> > What is the difference between "+" and "&" operator when joining > >> > strings? > >> > >> With "Option Strict On" - none at all. > >> > >> With "Option Strict Off" and joining only Strings - none at all. > >> > >> With "Option Strict Off" and joining Strings and /other/ data types - > >> the effects can be "interesting" ... > >> > >> HTH, > >> Phill W. > > > > Except that you can do += but not &=. > > > > B. > > I quickly tested it out by opening a module and typing: Sub a() Dim a As String a+=a a&=a End Sub The editor separated a+=a into a += a, but it separated a&=a to a& = a and underlined a& as an error. Which i assumed (incorrectly) that &= was not supported. So, perhaps a difference is whether the editor put in that space before the operator. With = is does, with & it does not. Well, nothing too important. :) Thanx for the correction. B. Brian Tkatch wrote:
Show quoteHide quote > Dick Sutton wrote: That is Basic Baggage. The & character once had a meaning at the end of >> I use &= in assignment statements all the time. For example: >> >> strHTML &= MonthName(CInt(sMonth), False) & " - " & sYear & >> "</h3></center><br>" >> >> Hope this helps... >> >> Dick >> >> "Brian Tkatch" <Maxwell_Sm***@ThePentagon.com> wrote in message >> news:1151593333.087137.67580@b68g2000cwa.googlegroups.com... >>> Phill W. wrote: >>>> Domac wrote: >>>>> What is the difference between "+" and "&" operator when joining >>>>> strings? >>>> With "Option Strict On" - none at all. >>>> >>>> With "Option Strict Off" and joining only Strings - none at all. >>>> >>>> With "Option Strict Off" and joining Strings and /other/ data types - >>>> the effects can be "interesting" ... >>>> >>>> HTH, >>>> Phill W. >>> Except that you can do += but not &=. >>> >>> B. >>> > > OK, i see, my mistake. Thanks for the correction. > > I quickly tested it out by opening a module and typing: > > Sub a() > Dim a As String > a+=a > a&=a > End Sub > > The editor separated a+=a into a += a, but it separated a&=a to a& = a > and underlined a& as an error. Which i assumed (incorrectly) that &= > was not supported. > > So, perhaps a difference is whether the editor put in that space before > the operator. With = is does, with & it does not. Well, nothing too > important. :) > > Thanx for the correction. > > B. > a variable name. The interpreter still recognises this, but it doesn't work any more. i dont know about myvar& not working but myvar% still does,
it still documented as working too guy Show quoteHide quote "Göran Andersson" wrote: > Brian Tkatch wrote: > > Dick Sutton wrote: > >> I use &= in assignment statements all the time. For example: > >> > >> strHTML &= MonthName(CInt(sMonth), False) & " - " & sYear & > >> "</h3></center><br>" > >> > >> Hope this helps... > >> > >> Dick > >> > >> "Brian Tkatch" <Maxwell_Sm***@ThePentagon.com> wrote in message > >> news:1151593333.087137.67580@b68g2000cwa.googlegroups.com... > >>> Phill W. wrote: > >>>> Domac wrote: > >>>>> What is the difference between "+" and "&" operator when joining > >>>>> strings? > >>>> With "Option Strict On" - none at all. > >>>> > >>>> With "Option Strict Off" and joining only Strings - none at all. > >>>> > >>>> With "Option Strict Off" and joining Strings and /other/ data types - > >>>> the effects can be "interesting" ... > >>>> > >>>> HTH, > >>>> Phill W. > >>> Except that you can do += but not &=. > >>> > >>> B. > >>> > > > > OK, i see, my mistake. Thanks for the correction. > > > > I quickly tested it out by opening a module and typing: > > > > Sub a() > > Dim a As String > > a+=a > > a&=a > > End Sub > > > > The editor separated a+=a into a += a, but it separated a&=a to a& = a > > and underlined a& as an error. Which i assumed (incorrectly) that &= > > was not supported. > > > > So, perhaps a difference is whether the editor put in that space before > > the operator. With = is does, with & it does not. Well, nothing too > > important. :) > > > > Thanx for the correction. > > > > B. > > > > That is Basic Baggage. The & character once had a meaning at the end of > a variable name. The interpreter still recognises this, but it doesn't > work any more. > Göran
| That is Basic Baggage. The & character once had a meaning at the end of As Guy suggests whatever& still works in both .NET 1.x & .NET 2.0.| a variable name. The interpreter still recognises this, but it doesn't | work any more. For example: Dim whatever& is short hand for: Dim whatever As Long For details see: http://msdn2.microsoft.com/en-us/library/s9cz43ek.aspx However I don't recommend using it, as only a very small subset of types are supported... -- Show quoteHide quoteHope this helps Jay B. Harlow [MVP - Outlook] ..NET Application Architect, Enthusiast, & Evangelist T.S. Bradley - http://www.tsbradley.net "Göran Andersson" <gu***@guffa.com> wrote in message news:%23DGmuV9mGHA.3544@TK2MSFTNGP05.phx.gbl... | Brian Tkatch wrote: | > Dick Sutton wrote: | >> I use &= in assignment statements all the time. For example: | >> | >> strHTML &= MonthName(CInt(sMonth), False) & " - " & sYear & | >> "</h3></center><br>" | >> | >> Hope this helps... | >> | >> Dick | >> | >> "Brian Tkatch" <Maxwell_Sm***@ThePentagon.com> wrote in message | >> news:1151593333.087137.67580@b68g2000cwa.googlegroups.com... | >>> Phill W. wrote: | >>>> Domac wrote: | >>>>> What is the difference between "+" and "&" operator when joining | >>>>> strings? | >>>> With "Option Strict On" - none at all. | >>>> | >>>> With "Option Strict Off" and joining only Strings - none at all. | >>>> | >>>> With "Option Strict Off" and joining Strings and /other/ data types - | >>>> the effects can be "interesting" ... | >>>> | >>>> HTH, | >>>> Phill W. | >>> Except that you can do += but not &=. | >>> | >>> B. | >>> | > | > OK, i see, my mistake. Thanks for the correction. | > | > I quickly tested it out by opening a module and typing: | > | > Sub a() | > Dim a As String | > a+=a | > a&=a | > End Sub | > | > The editor separated a+=a into a += a, but it separated a&=a to a& = a | > and underlined a& as an error. Which i assumed (incorrectly) that &= | > was not supported. | > | > So, perhaps a difference is whether the editor put in that space before | > the operator. With = is does, with & it does not. Well, nothing too | > important. :) | > | > Thanx for the correction. | > | > B. | > | | That is Basic Baggage. The & character once had a meaning at the end of | a variable name. The interpreter still recognises this, but it doesn't | work any more. Jay B. Harlow [MVP - Outlook] wrote:
Show quoteHide quote > Göran Oh, so it still works, even?> | That is Basic Baggage. The & character once had a meaning at the end of > | a variable name. The interpreter still recognises this, but it doesn't > | work any more. > As Guy suggests whatever& still works in both .NET 1.x & .NET 2.0. > > For example: > > Dim whatever& > > is short hand for: > > Dim whatever As Long > > For details see: > > http://msdn2.microsoft.com/en-us/library/s9cz43ek.aspx > > However I don't recommend using it, as only a very small subset of types are > supported... > Why didn't they get rid of that? They had the chance when they created VB.NET, now it's gonna haunt the VB language for ever... |
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