Programming language

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== Programming Language ==

A programming language is a formal language comprising a set of instructions that produce various kinds of output. Programming languages are used in computer programming to implement algorithms. Most programming languages consist of instructions for computers. There are programmable machines that use a set of specific instructions, rather than general programming languages. Since the early 1800s, programs have been used to direct the behavior of machines such as Jacquard looms, music boxes, and player pianos. The programs for these machines (such as a player piano's scrolls) did not produce different behavior in response to different inputs or conditions.

History

The first programming languages predate the modern computer. During the 1800s, Ada Lovelace created an algorithm for the Analytical Engine, which is often considered the first computer program. In the 1940s, the first high-level programming languages were developed, including Plankalkül by Konrad Zuse and Assembly language.

Types of Programming Languages

Programming languages can be categorized in several ways. The most common classifications are:

• High-level programming languages: These languages are closer to human languages and further from machine languages. Examples include Python, Java, and C++.
• Low-level programming languages: These languages are closer to machine languages and further from human languages. Examples include Assembly language and machine code.
• Procedural languages: These languages are based on the concept of procedure calls. Examples include C and Pascal.
• Object-oriented languages: These languages are based on the concept of "objects", which can contain data and code. Examples include Java, C++, and Python.
• Functional languages: These languages are based on mathematical functions. Examples include Haskell and Lisp.

Syntax and Semantics

The syntax of a programming language is the form of its expressions, statements, and program units. The semantics of a programming language provides the meaning of those expressions, statements, and program units. Syntax is usually defined using a combination of regular expressions (for lexical structure) and Backus–Naur form (for grammatical structure).

Compilation and Interpretation

Programming languages are typically either compiled or interpreted. A compiler translates a program written in a high-level language into machine code, which can be executed by a computer. An interpreter directly executes instructions written in a programming or scripting language without requiring them to have been compiled into a machine language program.

Popular Programming Languages

Some of the most popular programming languages include:

• Python
• Java
• C
• C++
• JavaScript
• Ruby
• PHP
• Swift
• Go

See Also

• Computer programming
• Software development
• Algorithm
• Compiler
• Interpreter (computing)
• Syntax (programming languages)
• Semantics (computer science)
• List of programming languages