> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/l/logical_operations.md).

# Logical operations

```ruby
func logic(a, b) {
    say ("a and b: ", a && b);
    say ("a  or b: ", a || b);
    say ("a xor b: ", a ^ b);
    say ("  not a: ", !a);
}
 
logic(false, true);
```

#### Output:

```
a and b: false
a  or b: true
a xor b: true
  not a: true
```