(&)

[&] (read as "and") is the fourth extended play by South Korean girl group Loona. It was released on June 28, 2021, by Blockberry Creative and distributed by Kakao Entertainment. The comeback marked the return of member HaSeul, who had been on hiatus due to health issues since early 2020.

Upon release, [&] became the group's fastest and best selling project. All of its tracks appeared on the Gaon Download Chart becoming their first album to do so and also earned the group their first ever entry on the Gaon Digital Chart with the lead single, "PTT (Paint the Town)". The project was met with generally positive reviews with critics praising its genre diversity and the group's experimentation with different sounds on the project.