Difference Between Procedural and Non-procedural Language

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In this post, we will understand the differences between procedural and non-procedural languages −

Procedural language

  • The program code is written in the form of a sequence of instructions.
  • The user would specify what has to be done and how it can be done, i.e the step by step procedure of it.
  • It is considered as a command-driven language.
  • It works with the state of machine.
  • Its semantics are tough in comparison to other paradigms.
  • The size of the program would be large.
  • These steps would be executed in a sequential method.
  • It returns restricted data types and certain allowed values only.
  • The overall efficiency is high.
  • The instructions are written to solve a specific/set of problems.
  • Examples of procedural languages include BASIC, FORTRAN, ALGOL, C, COBOL, and Pascal.
  • It is not suited for applications where time is a critical constraint.
  • The iterative loops and recursive calls are used while working in procedural languages.

Non-procedural Language

  • The user would specify what has to be done but doesn't get into the how it has to be done part.
  • It is known as an applicative or functional language.
  • It involves developing function based on other functions, in order to construct other complicated functionalities.
  • It works with the help of mathematical functions.
  • Its semantics are simple in comparison to procedural languages.
  • Examples of non-procedural languages include LISP, SQL, PROLOG.
  • It is considered as a function-driven language
  • It has the ability to return any datatype or value.
  • The overall efficiency of non-procedural language is low in comparison to procedural language.
  • The programs are small in size.
  • It is well-suited for applications where time is a critical factor.
  • Recursive calls are used while working with non-procedural languages.
Updated on 02-Mar-2021 05:20:24