*= Operator (Visual Basic)
Updated: July 20, 2015
For the latest documentation on Visual Studio 2017, see Visual Studio 2017 Documentation.
Multiplies the value of a variable or property by the value of an expression and assigns the result to the variable or property.
variableorproperty *= expression
Required. Any numeric variable or property.
Required. Any numeric expression.
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 ReadOnly.
*= operator first multiplies the value of the expression (on the right-hand side of the operator) by the value of the variable or property (on the left-hand side of the operator). The operator then assigns the result of that operation to the variable or property.
The * Operator can be overloaded, which means that a class or structure can redefine its behavior when an operand has the type of that class or structure. Overloading the
* operator affects the behavior of the
*= operator. If your code uses
*= on a class or structure that overloads
*, be sure you understand its redefined behavior. For more information, see Operator Procedures.
The following example uses the
*= operator to multiply one
Integer variable by a second and assign the result to the first variable.
Dim var1 As Integer = 10 Dim var2 As Integer = 3 var1 *= var2 ' The value of var1 is now 30.