Scala

Scala is the primary language for Spark. More than 70% of Spark's code is written in Scalable Language (Scala). Scala is a fairly new language. It was developed by Martin Odersky in 2001, and it was first launched publicly in 2004. Like Java, Scala also generates a bytecode that runs on JVM. Scala brings advantages from both object-oriented and functional-oriented worlds. It provides dynamic programming without compromising on type safety. As Spark is primarily written in Scala, you can find almost all of the new libraries in Scala API.