Functional languages

• Functional languages are a type of declarative language.
• Functional languages


  • No mutable data structures
  • Use of structures like mathematical expressions, where the same input will always result in the same output
  • Functions can call other functions and use the output of one function as the input for another
• Immutable data structures


  An attribute of functional programming languages that makes them ideal for processing Big Data
• Functional programming languages are commonly used in distributed processing to ensure data integrity
• One example of a functional programming language is Haskell.