What is C programs in C?

This article will help you to understand the basics of C Programs if you are a beginner starting your journey in Computer programming then this article will surely help you gain an understanding of C programs, making you familiar with them
authorImageVarun Saharawat30 Oct, 2025
What is C programs in C?

What is C?

C is a general-purpose computer programming language that is used to provide low-level access to systems memory. It's like a set of instructions that tells a computer what to do.  Came into existence in 1972, it is one of the oldest programming languages which is considered as the foundation of many other programming languages. You can use C to do many different tasks, like calculations, reading information, or making several low-level programs.

C Programs- Key Takeaways

  • Understanding What C Programs are.
  • Understanding the Advantages, disadvantages, and uses of C programs.
  • Understanding the major difference between C programs and C++ Programs.
  • Getting an insight into the history of C programs. 

Pros and Cons of Using C Programs

The C programs comes with various features and advantages that makes it one of the most widely used programming languages of all time.  Some of the key advantages of the C programs are: Pros:
  1. Fast: C being a compiler-based language, takes less time for compiling and execution. This makes C programs a good choice for speedy software like games or big machines.
  2. Flexible: This language lets you do a lot of different things like- you can write small C programs or big ones, depending on what you need.
  3. Portable: C Programming language can work on different types of computers and operating systems without needing a lot of changes.
  4. Structured: C Programs uses structured programming concepts, which makes them easy to understand and modify.
  5. Mid-level Programming Language: C language is a mid-level programming language, which generally offers features of both low-level and high-level languages.
  6. Rich Library: C Programs are equipped with various built-in rich libraries which help in the smooth development process.
  7. Extendable: It is an extendable language that can be further extended with a lot more features and functionalities, The common extended version of C is C++.
  8. Recurrcion- The C programs allow developers to backtrack which promotes code reusability. 
Cons As every coin has two sides, C programming language also has some disadvantages of it. Some of the few disadvantages are written below for your reference:
  1. OOP Feature: C Program does not support OOPs (Object Oriented Programming) Feature because of which multiple inheritances are not possible in C.
  2. Namespace Feature: C Programs doesn't support the namespace feature, which means it is not possible to create multiple variables with the same name.
  3. Runtime Checking: All the errors in the C programs are presented by the compiler after the program has been written. This makes code-checking a challenge, especially for large C programs.
  4. Lack of Constructor / Destructor: Since C is not an object-oriented language, it lacks the feature of a Constructor or destructor, which means constructing or destructing a variable in C programs requires manual operation through a function or by any other means. 
  5. Lack of Garbage collection:  Garbage collection is a feature that automatically reclaims memory from objects that are no longer required by the library or an app. C Programs lack this feature.

Where is C Used?

C language, being one of the most popular programming languages known for its flexibility and portability, is widely used by developers across different domains and industries for various applications. some common applications of C language are:
  1. Operating Systems: The main parts of computer operating systems like Windows, Linux, and macOS are written using C Programs.
  2. Embedded Systems: C programs are widely used for programming in small devices like microcontrollers in cars, appliances, and gadgets.
  3. Software Development: Many software applications, especially ones that need to be fast and efficient, are built using the C Programs.
  4. Language Interpreter: The C Programs are widely used in the manufacturing of Language interpreter software.

Difference Between C and C++

C and C++ sound quite similar to each other, but they have a lot of major differences between them. C++ is an advanced version of C language or we can say it is a superset of C language which follows an entirely different set of programming concepts. The table below shows the main differences between the two languages, making it easier for you to see how they are different and understand them better.
        C Programming Language     C++ Programming Language
C is a procedural language, primarily based on functions. C++ is an Object-Oriented Programming language.
C does not support concepts like - Abstraction, Polymorphism, Inheritance, and Encapsulation. C++ being an Object-oriented language, supports concepts like - Abstraction, Polymorphism, Inheritance, and Encapsulation.
C language does not support user-defined data types. C++ supports user-defined data types.
Exception handling is not supported in C programs. Exception handling is supported in C++.
There is no concept of Access modifiers in C Programs. Access modifiers are included in C++.
Requires <stdio.h> header file for I/O operations. <iostream> is used to perform I/O operations in C++
Memory management is manual and complex as calloc() and malloc() functions are used for memory management. Memory management in C++ is also manual but less complex as it uses memory management operators like new and free.
Files are stored with .c extension in C programs. Files in C++ are stored with .cpp extension.
History of C The history of the C programming language dates back to 1972, when Dennis Ritchie, a computer scientist at Bell Laboratories, developed C programming language as an evolution of the earlier B language. The developer's main goal was to create such a language that would provide both, Low-level access to computer hardware and high-level abstraction for software development.  C language quickly gained popularity due to its simplicity, efficiency, and portability across different platforms. In 1978, the first edition of "The C Programming Language" book by Dennis Ritchie was published, which became the definitive guide for learning C. Over the years, C became the foundation for many other programming languages and played a crucial role in the development of operating systems, compilers, and software applications.  If you are an aspiring programmer looking forward to starting your journey as a Software Developer, I would recommend you to start it with a C language as it is easy to use and considered as a foundation of many other languages like- C++, Python, Java, etc.

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C programs FAQs

What are arrays and pointers in C?

Arrays in C allow you to store multiple elements of the same data type in contiguous memory locations while Pointers are variables that store memory addresses and are widely used for dynamic memory allocation and manipulation.

What is the difference between == and = in C?

The == operator is used for comparison or we can say for equality check between two operands, while the = operator is an assignment operator that is used for assigning value to an element.

What are global and local variables in C?

Global variables in C Programming Language are declared outside of any function and can be accessed by any function in the program. Local variables are declared inside a function and can only be accessed within that function.