Vb.net-assignment-operators

VB.Net-割り当て演算子

VB.Netでサポートされている次の割り当て演算子があります-

Operator	Description	Example
=	Simple assignment operator, Assigns values from right side operands to left side operand	C = A + B will assign value of A + B into C
+=	Add AND assignment operator, It adds right operand to the left operand and assigns the result to left operand	C += A is equivalent to C = C + A
-=	Subtract AND assignment operator, It subtracts right operand from the left operand and assigns the result to left operand	C -= A is equivalent to C = C - A
*=	Multiply AND assignment operator, It multiplies right operand with the left operand and assigns the result to left operand	C *= A is equivalent to C = C *A
/=	Divide AND assignment operator, It divides left operand with the right operand and assigns the result to left operand (floating point division)	C/= A is equivalent to C = C/A
\=	Divide AND assignment operator, It divides left operand with the right operand and assigns the result to left operand (Integer division)	C \= A is equivalent to C = C \A
^=	Exponentiation and assignment operator. It raises the left operand to the power of the right operand and assigns the result to left operand	C^=A is equivalent to C = C ^ A
<⇐	Left shift AND assignment operator	C <⇐ 2 is same as C = C << 2
>>=	Right shift AND assignment operator	C >>= 2 is same as C = C >> 2
&=	Concatenates a String expression to a String variable or property and assigns the result to the variable or property.	Str1 &= Str2 is same as Str1 = Str1＆Str2

例

VB.Netで利用可能なすべての割り当て演算子を理解するために、次の例を試してください-

Module assignment
   Sub Main()
      Dim a As Integer = 21
      Dim pow As Integer = 2
      Dim str1 As String = "Hello! "
      Dim str2 As String = "VB Programmers"
      Dim c As Integer
      c = a
      Console.WriteLine("Line 1 - =  Operator Example, _
      Value of c = {0}", c)
         c += a
         Console.WriteLine("Line 2 - +=  Operator Example, _
      Value of c = {0}", c)
         c -= a
         Console.WriteLine("Line 3 - -=  Operator Example, _
      Value of c = {0}", c)
         c* = a
         Console.WriteLine("Line 4 - *=  Operator Example, _
      Value of c = {0}", c)
         c/= a
         Console.WriteLine("Line 5 -/=  Operator Example, _
      Value of c = {0}", c)
         c = 20
         c ^= pow
         Console.WriteLine("Line 6 - ^=  Operator Example, _
      Value of c = {0}", c)
         c <<= 2
         Console.WriteLine("Line 7 - <<=  Operator Example,_
      Value of c = {0}", c)
         c >>= 2
         Console.WriteLine("Line 8 - >>=  Operator Example,_
      Value of c = {0}", c)
         str1 &= str2
         Console.WriteLine("Line 9 - &=  Operator Example,_
      Value of str1 = {0}", str1)
         Console.ReadLine()
   End Sub
End Module

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上記のコードをコンパイルして実行すると、次の結果が生成されます-

Line 1 - =  Operator Example, Value of c = 21
Line 2 - += Operator Example, Value of c = 42
Line 3 - -= Operator Example, Value of c = 21
Line 4 - *= Operator Example, Value of c = 441
Line 5 -/= Operator Example, Value of c = 21
Line 6 - ^= Operator Example, Value of c = 400
Line 7 - <<= Operator Example, Value of c = 1600
Line 8 - >>= Operator Example, Value of c = 400
Line 9 - &= Operator Example, Value of str1 = Hello! VB Programmers

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