Question: is the f-35 a fifth generation fighter

Answer: Yes, As of March 2018, the only combat-ready fifth-generation fighters are the Lockheed Martin F-22 Raptor, which entered service with the United States Air Force in 2005; the Lockheed Martin F-35 Lightning II, which entered service in 2015 and the Chengdu J-20, which entered service with the People's Liberation Army Air Force (PLAAF) in September 2017. The Sukhoi Su-57 is slated for delivery to the Russian Air Force in 2019. The HAL AMCA, TAI TFX, Shenyang J-31, and Mitsubishi X-2 Shinshin are currently under early stages of development.