Arithmetic Operators
The arithmetic operators perform arithmetic operations on all the numeric type operands such as sbyte, byte, short, ushort, int, uint, long, ulong, float, double, and decimal.
| Operator | Name | Description | Example |
|---|---|---|---|
| + | Addition | Computes the sum of left and right operands. | int x = 5 + 5; |
| – | Subtraction | Subtract the right operand from the left operand | int x = 5 – 1; |
| * | Multiplication | Multiply left and right operand | int x = 5 * 1; |
| / | Division | Divides the left operand by the right operand | int x = 10 / 2; |
| % | Reminder | Computes the remainder after dividing its left operand by its right operand | int x = 5 % 2; |
| ++ | Unary increment | Unary increment ++ operator increases its operand by 1 | x++ |
| — | Unary decrement | Unary decrement — operator decreases its operand by 1 | x– |
| + | Unary plus | Returns the value of operand | +5 |
| – | Unary minus | Computes the numeric negation of its operand. | -5 |
Assignment Operators
The assignment operator = assigns its right had value to its left-hand variable, property, or indexer. It can also be used with other arithmetic, Boolean logical, and bitwise operators.
| Operator | Name | Description | Example |
|---|---|---|---|
| = | Assignment | Assigns its right had value to its left-hand variable, property or indexer. | x = 10; |
| x op= y | Compound assignment | Short form of x =x op y where op = any arithmetic, Boolean logical, and bitwise operator. | x += 5; |
| ??= | Null-coalescing assignment | C# 8 onwards, ??= assigns value of the right operand only if the left operand is null | x ??= 5; |
Comparison Operators
Comparison operators compre two numeric operands and returns true or false.
| Operator | Description | Example |
|---|---|---|
| < | Returns true if the right operand is less than the left operand | x < y; |
| > | Returns true if the right operand is greater than the left operand | x > y; |
| <= | Returns true if the right operand is less than or equal to the left operand | x <= y |
| >= | Returns true if the right operand is greater than or equal to the left operand | x >= y; |
Equality Operators
The equality operator checks whether the two operands are equal or not.
| Operator | Description | Example |
|---|---|---|
| == | Returns true if operands are equal otherwise false. | x == y; |
| != | Returns true if operands are not equal otherwise false. | x != y; |
Boolean Logical Operators
The Boolean logical operators perform a logical operation on bool operands.
| Operator | Description | Example |
|---|---|---|
| ! | Reverses the bool result of bool expression. Returns false if result is true and returns true if result is false. | !false |
| & | Computes the logical AND of its operands. Returns true only when both true, otherwise false. | x & y; |
| | | Computes the logical OR of its operands. Returns true when any one result is true. | x | y; |
| ^ | Computes the logical exclusive of its operands. It returns true only if any one operand is true and another operand is false, otherwise returns false. | x ^ y; |
| && | Computes the logical AND of its bool operands. Returns true both operands are true, otherwise returns false. | x && y; |
| || | Computes the logical OR of its bool operands. Returns true when any one operand is true. | x || y; |
Operator Evaluation & Precedence
Evaluation of the operands in an expression starts from left to right. If multiple operators are used in an expression, then the operators with higher priority are evaluated before the operators with lower priority.
The following table lists operators starting with the higher precedence operators to lower precedence operators.
| Operators | Category |
|---|---|
| x.y, x?.y, x?[y], f(x), a[i], x++, x–, new, typeof, checked, unchecked, default, nameof, delegate, sizeof, stackalloc, x->y | Primary |
| +x, -x, !x, ~x, ++x, –x, ^x, (T)x, await, &x, *x, true and false | Unary |
| x..y | Range |
| x * y, x / y, x % y | Multiplicative |
| x + y, x – y | Additive |
| x << y, x >> y | Shift |
| x < y, x > y, x <= y, x >= y, is, as | Relational and type-testing |
| x == y, x != y | Equality |
| x & y | Boolean logical AND |
| x ^ y | Boolean logical XOR |
| x | y | Boolean logical OR |
| x && y | Conditional AND |
| x || y | Conditional OR |
| x ?? y | Null-coalescing operator |
| c ? t : f | Conditional operator |
| x = y, x += y, x -= y, x *= y, x /= y, x %= y, x &= y, x |= y, x ^= y, x <<= y, x >>= y, x ??= y, => | Assignment and lambda declaration |
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