# Operators — Core Java

Source: https://www.geekswithgeeks.com/en/core-java/java-operators

> Work through Java's arithmetic, comparison and logical operators, short-circuit evaluation, and the pitfalls of integer division and silent overflow.

## The common set

`+ - * / %` for arithmetic, `== != < > <= >=` for comparison, `&& || !` for boolean logic (short-circuiting), and `+=`, `++` style compound assignment.

```java
int a = 7, b = 2;
System.out.println(a / b);    // 3  (integer division!)
System.out.println(a % b);    // 1
System.out.println(a / 2.0);  // 3.5 (one double operand)
```

## Integer overflow is silent

`int` is 32-bit and wraps around past ~2.1 billion with no error. Use `long` for large counts, or `Math.addExact(...)` to get an exception on overflow.