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Introduction to C

C language is one of the most popular high-level programming languages, which Dennis Ritchie initially developed for the Unix OS.

C is often the first programming language learned by students. Learning C forms the base for other popular programming languages such as C++ or C#. Even now, C remains the 11th most popularly used language in the world. Moreover, C opens the door for developer jobs – the average base salary of a C developer is $93,987 per year.

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The C programming language was first used on a Digital Equipment Corporation computer called PDP–11 in 1972. It is a procedural programming language whose primary purpose is to be used as a system’s programming language to write an operating system. Many popular operating systems, such as the Unix operating system and all Unix-related applications, are written in the C language.

Table of Contents

Introduction to C

Basics of C

Features of C

Applications of C

Final Thoughts

Frequently Asked Questions (FAQs)

Recommended Articles

Key Highlights

C is a high-level, procedural programming language used to develop system software, application software, and embedded systems.

C is a compiled language, highly extensible, platform independent, and provides direct access to system resources and memory management capabilities.

It is used to develop operating systems, device drivers, games, database systems, and more.

C is highly efficient, portable, and widely used. It also provides low-level memory access and has an extensive library of functions.

If not used properly, c can be prone to security vulnerabilities, and pointer management can get confusing.

C Language Basics

It is among the most popular languages among developers as it is easy to learn, produces efficient programs, is a structured language, can handle low-level activities, and can be compiled on various computers.

C language has B language as its primary parent language, which was developed in the 1970s.

The ANSI ( American National Standard Institute ) formalized this language as an official programming language in 1988.

It is the most popular choice for system-friendly programming languages.

The main reason for using C language as the system-specific programming language is its high speed and efficiency, which is close to the assembly language.

C allows the development of state-of-art software.

C programs have an extension of .c after the filename.

Characteristics and Features of C

Procedural Programming: C follows a step-by-step approach to solving a problem or performing a task.

High-Level Language: C provides abstracted programming concepts that allow developers to focus on the logic of their programs rather than low-level details.

Compiled Language: C source code compiles into machine code before execution.

Efficient: C provides direct access to system resources and memory management capabilities.

Platform Independent: C compiles to run on various platforms, including Windows, Linux, and macOS.

Extensible: C allows developers to write libraries and extend the language’s functionality.

Widely Used: C is one of the most commonly used programming languages and has been the basis for many other languages.

Applications of C


Operating systems

C language’s flexibility and versatility make it suitable for the efficient development of operating systems.


C compiler directly converts code into machine language, allowing maximum control with a minimal set of commands, making it a good choice for microcontrollers.

Scientific systems

C allows the building and creation of many scientific systems.


C can create assemblers that are put to use to execute machine-level hardware-specific systems.

Text Editors

C can create lightweight text editors.

Print spoolers

C develops the software program responsible for sending jobs to the printer once the command fires.

Network drivers

C can create network drivers responsible for accessing the internet and running WIFI and other kinds of drivers.

Modern programs

C can develop modern programs requiring less memory and work closer to hardware communication.


C creates software to store a massive amount of data.

C develops software responsible for changing language types from high-level to machine-level language.


C helps develop various command and program system-specific utilities.

Advantages of C

Building block for major programming languages

Devoid of OOPS concept

Fast and efficient language

No strict type checking

Highly portable and interoperable

No checks for runtime

No provision for having a namespace

Extendable with library functions

No concept of a constructor and destructor

Final Thoughts

Learning the C programming language can be an excellent asset for anyone interested in software development or computer science. As a founding language, C has inspired several contemporary programming languages and is still widely utilized in several applications today. It is beneficial for creating low-level software, such as operating systems and device drivers, because of its focus on efficiency and control. By mastering the concepts and syntax of C programming, one can gain valuable skills that will serve well throughout one’s career in software development.

Frequently Asked Questions (FAQs)

Q: What is the introduction of C?

Answer: C is a high-level, general-purpose programming language developed in the 1970s by Dennis Ritchie at Bell Labs. It was designed to be a portable and efficient language used for system programming and developing applications.

Q: What is C, the basic concept?


C’s basic concepts include variables, data types, control structures, functions, arrays, and pointers. Variables store data, while data types define the type of data that can be stored in a variable.

Control structures include if-else statements, loops, and switch-case statements.

Functions are reusable blocks of code that can be called from other program parts.

Arrays store a collection of values of the same data type, while pointers store a variable’s memory address.

Q: What is C language, and explain?

Answer: C is a structured, procedural programming language that allows developers to write efficient and portable code. It has a simple syntax and a small set of keywords, making it easy to learn and use. With its simple syntax and a small set of keywords, C is relatively easy to learn and use.

Q: What is C language for?

Answer: C is used for various applications, such as developing operating systems, device drivers, embedded systems, gaming, scientific computing, and high-performance applications. It is also used in the development of programming languages and compilers. C’s low-level features and efficient code make it an ideal language for system programming and developing high-performance applications.

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