How to do complex conditionals in Bash (mix of 'and' &&, 'or' || ...)

Question

How do I accomplish something like the following in Bash? ``` if ("$a" == "something" || ($n == 2 && "$b" == "something_else")); then ... fi ```

Accepted Answer

You almost got it:

```
if [[ "$a" == "something" || ($n == 2 && "$b" == "something_else") ]]; then
```

In fact, the parentheses can be left out because of operator precedence, so it might also be written as

```
if [[ "$a" == "something" || $n == 2 && "$b" == "something_else" ]]; then
```

Solution