What does "&=" mean in visual basic?

Question

In this code

For j As Integer=1 To 3
  row=""
  For k As Integer =1 To 3
     entry= j & "x" & k & "=" & (j*k)
     row &= entry & " "
  Next
  lstTable.Items.Add(row)
  

What does this "&=" mean?

Answer 1

Taking the question at face value, &= means string concatenation.

Do be aware that strings are immutable though. :)

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Still lost in code, just at a little higher level.

:-)

Answer 2

What does this "&=" mean?

Reference is here:
http://msdn.microsoft.com/en-us/library/fz1zs43f.aspx

Answer 3

Hi,

 It is used to concatenate Strings. If you have a string like Str = "A" and then used Str &= "B" then the string would be "AB". You can read about the Operators at the link below.   8)

&= Operator

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If you say it can`t be done then i`ll try it

Answer 4

So for example the &= in the following snippet sets the variable str to "ABCDEF".

Dim str As String = "ABC"
str &= "DEF" 'Equivalent to str = str & "DEF"

There are several operators in VB that consist of a simple operator followed by =. For example

num += 1 'Same as num = num + 1
num *= 2 'Same as num = num * 2

Answer 5

I  type the "&=" in search, and I get nothing, what is  the problem?

Answer 6

I  type the "&=" in search, and I get nothing, what is  the problem?

What search? Did you use Google? Bing? Yahoo? MSDN? Other?

Try this:

http://lmgtfy.com/?q=msdn+visual+basic+operator+%26%3D

Look at the pages linked, or page down about 3 pages and you should see:

&= Operator (Visual Basic) - MSDN - Microsoft
msdn.microsoft.com/en-us/.../fz1zs43f.asp...
Microsoft Developer Network
The element on the left side of the &= operator can be a simple scalar variable, a property,
or an element of an array. The variable or property cannot be ...

http://msdn.microsoft.com/en-us/library/fz1zs43f.aspx

Just "&=" alone isn't specific enough for most searches, you need to narrow it.

- Wayne

Answer 7

The new shortcut operators include +=, -=, &=, and others.  They are exactly the same as (for example):

numA = numA + anothernum
numA += anothernum

stringA = stringA & anotherstring
stringA &= anotherstring

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Solitaire

Answer 8

The new shortcut operators include +=, -=, &=, and others.  They are exactly the same as (for example):

stringA = stringA & anotherstring
stringA &= anotherstring

It's worth bearing in mind, if accustomed to using these operators in other languages, that
their use in VB is different. For example, the &= operator in C/C++/C# is the bitwise
AND assignment operator, since in those languages the & is the bitwise AND operator.

- Wayne