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*= Operator (C# Reference) 

The binary multiplication assignment operator.

Remarks

An expression using the *= assignment operator, such as

x *= y

is equivalent to

x = x * y

except that x is only evaluated once. The * operator is predefined for numeric types to perform multiplication.

The *= operator cannot be overloaded directly, but user-defined types can overload the * operator (see operator).

Example

// cs_operator_multiplication_assignment.cs
using System;
class MainClass
{
    static void Main() 
    {
        int a = 5;
        a *= 6;
        Console.WriteLine(a);
    }
}

Output

30

See Also

Reference

C# Operators

Concepts

C# Programming Guide

Other Resources

C# Reference