50 years ago 99.9% of computer programs were written in completely imperative assembly language programs, such that even arithmetic involved statements and temp

50 years ago 99.9% of computer programs were written in completely imperative assembly language programs, such that even arithmetic involved statements and temporary mutable variables. Fortran was a more mathematical higher-level language with boolean and arithmetic expressions. Functional programming just continues this trend, resulting in more mathematical, higher-level declarative languages, which as far as I am concerned, makes them more suitable for modelling real world business problems.