%= Operator (C# Reference)


Updated: July 20, 2015

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The remainder assignment operator.

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 compute the remainder after division.

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

    class Test2
        static void Main()
            int a = 5;
            a %= 3;
    // Output: 2

C# Reference
C# Programming Guide
C# Operators