f(x) is a South Korean girl group formed by SM Entertainment in 2009. The name is a play on the mathematical notation for function. The f stands for flower and the x represents the female’s double x chromosome. f(x) strives to be the kind of girl group that can change and adapt to many situations. The group members have also been nicknamed “function girls”. The group made their debut on September 5, 2009 with release of a digital single “La Cha Ta” (stylized as “LA chA TA”). The group is currently composed of four members: Victoria, Luna, Amber, and Krystal. 5th member Sulli left the group in August 2015.
Function Love is an international fanbase for f(x) that updates on photos, videos and news every day, along with translations to the members’ social media updates and subtitled videos. It is one of the biggest sources for everything f(x). It was founded on October 6th 2012.