<prompt> List the most popular programming languages in 2021.  <response>: Currently, the most popular programming languages in 2021 According to TIOBE Index as of September, 2021 are:1. C2. Python3. Java4. C5. C6. JavaScript7. PHP8. R9. Swift10. Groovy Keep in mind that the popularity of languages is dynamic and can change rapidly based on a variety of factors, including industry demand and advancements in technology. 