Operator:
. An object that is capable of manipulating value or operand.
Types of Operators:
1. Arithmetic Operators:
| Operator | Description |
|---|---|
| + | Adds two values |
| - | Subtracts two values |
| * | Multiplies two values |
| / | Divides two values |
| % | Returns remainder of two values |
2. Logical / Relational Operators:
| Operator | Description |
|---|---|
| == | Returns true if two operands are equal |
| != | Returns true if two operands are unequal |
| > | Returns true if left value is greater than right |
| < | Returns true if left value is less than right |
| >= | Returns true if left value is greater than or equal to right |
| <= | Returns true if left value is less than or equal to right |
| && | Returns true if both expressions are true |
| || | Returns true if either of expressions is true |
| ! | Reverses the value of expression |
3. Bitwise Operators:
. Works on bits.
. Converts value of operand into bits and perform operations.
| Operator | Description |
|---|---|
| & | Performs Binary AND between two operands |
| | | Performs Binary OR between two operands |
| ^ | Performs Binary XOR between two operands |
| ~ | Complements value |
| << | Performs Binary shift left |
| >> | Performs Binary shift right |
4. Assignment Operators:
| Operator | Description |
|---|---|
| = | Simple Assignment |
| += | Adds and assigns result in left operand |
| -= | Subtracts and assigns result in left operand |
| *= | Multiplies and assigns result in left operand |
| /= | Divides and assigns result in left operand |
| %= | Perform modulus and assigns result in left operand |
| <<= | Perform binary left shift and assigns result in left operand |
| >>= | Perform binary right shift and assigns result in left operand |
| &= | Perform logic AND and assigns result in left operand |
| |= | Perform logic OR and assigns result in left operand |
5. Unary Operators:
| Operator | Description |
|---|---|
| + | Unary plus |
| - | Unary minus |
| ++ | Post/Pre Increment |
| -- | Post/Pre Decrement |
Precedence:
. Characteristic of operators which indicates when they will be evaluated when they appear in expression.
. Example: '*' has higher precedence than '+'
. When several operations occur in expression, each part is evaluated and resolved in an order.
. Mathematical expressions should follow BODMAS rule which shows precedence of using operator in levels.
. Mathematical expressions should follow BODMAS rule which shows precedence of using operator in levels.
. In programming languages, we must follow operator precedence while performing calcualations
| Operator | Precedence |
|---|---|
| Postfix | expr++ expr-- |
| Unary | ++expr --expr +expr -expr |
| Multiplicative | * / % |
| Additive | + - |
| Shift | << >> |
| Relational | < > <= >= |
| Equality | == != |
| Bitwise AND | & |
| Bitwise XOR | ^ |
| Bitwise OR | | |
| Logical AND | && |
| Logical OR | || |
| Assignment | = += -= *= /= %= <= >= |