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# Appendix EOperators

The C# operators fall into four main categories: arithmetic, comparison, logical, and bitwise. The following sections explain these categories and the operators they contain. The end of this appendix describes operator precedence and special operators, as well as operator overloading.

## Arithmetic Operators

The following table lists the arithmetic operators provided by C#.

 Operator Purpose Example Result `++` Increment `x++` or `++x` Sets `x = x + 1` `--` Decrement `x--` or `--x` Sets `x = x - 1` `–` Negation `-x` Sets `x = -x` `+` Unary plus `+x` Sets `x = +x` (leaves `x` unchanged) `*` Multiplication `2 * 3` `6` `/` Division `3.0 / 2` `1.5` `%` Modulus `17 % 5` `2` `+` Addition `2 + 3` `5` `+` Concatenation `"Bob " + "Baker"` `"Bob Baker"` `-` Subtraction `3 - 2` `1` `<<` Bit left shift `10110111 << 1` `01101110` `>>` Bit right shift `10110111 >> 1` `01011011`

## Comparison Operators

The following table lists the comparison operators provided by C#.

 Operator Purpose Example Result `==` Equals `A == B` `true` if `A` equals `B`. `!=` Not equals `A != B` `true` if `A` does not equal `B`. `<` Less than `A < B` `true` if `A` is less than `B`. `<=` Less than or equal to `A <= B` `true` if `A` is less than or equal to `B`. `>` Greater than `A > B` `true` if `A` is greater than `B`. `>=` Greater than or equal to `A >= B` `true` if `A` is greater than or equal to `B`. `is` Object is or inherits from a certain type `obj is Manager` `true` if `obj` is an object that inherits from `Manager`.

## Logical Operators

The following table summarizes the C# logical operators.

 Operator Purpose Example Result `!` Negation `!A` `true` if `A` is `false`. `&` And `A & B` `true` if `A`

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