程序语言：
在过程语言中，程序代码被编写为指令序列。用户必须指定“做什么”和“如何做”(分步程序)。这些指令按顺序执行。这些说明是为解决特定问题而编写的。
Examples of Procedural languages:
FORTRAN, COBOL, ALGOL, BASIC, C and Pascal.非程序语言：
在非过程语言中，用户只需要指定“做什么”而不是“怎么做”。它也被称为应用语言或功能语言。它涉及从其他功能开发功能以构建更复杂的功能。
Examples of Non-Procedural languages:
SQL, PROLOG, LISP.程序语言和非程序语言的区别：
| Procedural Language | Non-Procedural Language |
|---|---|
| It is command-driven language. | It is a function-driven language |
| It works through the state of machine. | It works through the mathematical functions. |
| Its semantics are quite tough. | Its semantics are very simple. |
| It returns only restricted data types and allowed values. | It can return any datatype or value |
| Overall efficiency is very high. | Overall efficiency is low as compared to Procedural Language. |
| Size of the program written in Procedural language is large. | Size of the Non-Procedural language programs are small. |
| It is not suitable for time critical applications. | It is suitable for time critical applications. |
| Iterative loops and Recursive calls both are used in the Procedural languages. | Recursive calls are used in Non-Procedural languages. |