Source codes and concepts

This section consists of tutorials and source codes for frequently asked programs in C, C++, Java, SQL, PHP & HTML.

The code for all of the above-mentioned languages is properly highlighted using Crayon Syntax Highlighter and available for download in .txt and .java (for java programs) format.

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How to run the codes

List of languages
C is a general-purpose programming language initially developed by Dennis Ritchie in 1969. C program source code is free-format, using the semicolon as a statement terminator and curly braces for grouping blocks of statements. Concepts include functions, arrays, pointers.

> C programs

C++ (pronounced “see plus plus”) is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. It is regarded as an intermediate-level language, as it has a combination of both high-level and low-level language features.

> C++ programs

Java is a general-purpose, concurrent, class-based, object-oriented computer programming language that is specifically designed to have as few implementation dependencies as possible. It is intended to let application developers “write once, run anywhere”.

> Java programs

SQL, the abbreviation for (Structured Query Language) is a special-purpose programming language designed for managing data held in a relational database management systems (RDBMS).
Operations include insert, query, update, delete etc.

> SQL programs

PHP is a server-side scripting language designed for web development but also used as a general-purpose programming language. Originally created by Rasmus Lerdorf, the implementation of PHP is now produced by The PHP Group.

> PHP programs

HTML or HyperText Markup Language is the standard markup language used to create web pages. HTML allows images & objects to be embedded and used to create interactive forms, pages and sites. The current version of HTML is HTML5.

> HTML programs

Importance of programming languages

Soon after technology evolved as the principal driving force behind many businesses, the need for automation of processes was felt. This could be done with what was known as a ‘software’. This particular software required to handle multiple tasks in a business was written using programming languages, which was nothing other than a medium of expressing the underlying logic and alogrithm.

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And the aforementioned COBOL (Common Business-Oriented Language), one of the earliest standardized programming languages, is largely based on work done in the nineteen-fifties by Grace Hopper, a...

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