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Chapter 2 - Operators and Expressions
Operators are used to perform operations on variables and values.
Figure: Operator Expression Diagram
A simple arithmetic expression showing: 7 + 11 = 18, with arrows pointing to labels identifying "operand", "operator", "operand", and "result".
Types of operators
- Arithmetic operators → +, -, *, /, %, ++, --
- Assignment operators → =, +=
- Comparison operators → ==, >=, <=
- Logical operators → &&, ||, !
- Bitwise operators → &, | (operates bitwise)
Arithmetic operators cannot work with booleans
% operator can work on floats & doubles
Precedence of operators
The operators are applied and evaluated based on precedence. For example (÷,-) has less precedence compared to (*,/). Hence * & / are evaluated first.
In case we like to change this order, we use parenthesis
Associativity
Associativity tells the direction of execution of operators
It can either be Left to Right or Right to left
| Operator | Associativity |
|---|---|
| * / | L to R |
| + - | L to R |
| ++, = | R to L |
