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What is Computer Programming?
Computer programming is the drafting of a set of instructions intended to be followed by a computer or another program. The most common type of computer program involves a sequence of commands or one or more sets of machine code instructions written by a human in order to perform some specific task, such as changing the color settings on an output device. This contrasts with declarative content (such as data stored in non-volatile memory) which primarily instructs what to do without specifying how it is done.
While the term “program” as a noun is used often both in the general and specific senses, “programming” can be viewed as a special case of software engineering. The use of computer software is connected to the usage of computer hardware , but they are distinct types of systems where neither is dependent on the other.
Computer programmers (or software engineers) write and test programs that instruct computers how to perform tasks. These programs are inspected for correct operation and for potential errors by computer program verification tools. If a program is correct, it operates correctly. If a mistake is found in the program, the programmer may choose to correct it; if not, the programmer must decide whether to inform others of the problem or to accept that it is an inevitable effect of using a complex system without error detection.
Types of computer programming languages:
- Procedural languages: These are those which strictly follow steps and procedures. A procedural language is often simplistic, and sometimes even error-prone. Procedural languages sometimes make use of an interactive environment to ease the creation of highly repetitive code. Interactive environments often provide “code comments” to allow for easy understanding and assessment at a later stage when errors in the code have been introduced or when other problems exist that would prevent a program from being completed or from being easily understood by its intended audience.
- Imperative languages: These are those which strictly follow a sequence of steps and procedures. Imperative languages are often fast, efficient, high-level languages in which the number of predefined rules and actions that can be performed is limited to a minimum. A high level language is often easier to use than a procedural language, but it is less structured than an algorithmic language. An algorithmic language allows for more complex program structures to be created (especially if it is able to accommodate procedural and object-oriented programming).
- Declarative languages: These are those which follow a sequence of steps, but the programmer’s intent is not fully expressed until much later. Declarative languages may be used for solving problems that can be described by formulas or formulas that can be approximated by mathematical formulas. Examples of declarative languages are the C programming language, Fortran and BASIC.
- Logic programming languages: These are are a class of programming languages which focus on carrying out true logical deductions rather than on performing simple arithmetic operations. Logic programming languages are developed primarily to solve NP-complete problems, although they have also proven useful in enumerating all possible solutions to problems (see Knuth, 1998; and Kolmogorov complexity).
- Functional programming languages: These are a class of programming languages that emphasize higher-order functions and list processing instead of scalar operations.
- Object-oriented programming languages: These are a class of programming languages that provide features similar to the ones found in object-oriented programming methodologies. They enable programmers to use objects as modular, reusable software components. This adds a new level of code reusability to the hierarchical code structure of procedural languages. A pure object-oriented language is Smalltalk, in which every value is an object and there are no non-object values (such as numbers). Examples of languages that do not follow this rule include C++, Java and Python.
Why Computer Programming is Important?
There are many different types of computer programming. A programmer’s choice of program type depends on the requirements and constraints of a particular design or problem, as well as his or her preferred method of describing problems and solutions.
- Computer programming provides the flexibility to easily create appropriate solutions for a wide variety of applications and tasks; this is particularly true with modern programming languages and systems, although even a limited amount of computer programming provides enough capabilities to deal with many problems that can arise in the real world.
- Computer programming is an art. As such, it relies on the creative abilities of its practitioners to evolve, adapt and produce new and useful solutions to problems.
- Computer programming remains one of the most important skills for those who want to make a career in information technology or digital technologies, due to the high demand for skilled computer programmers worldwide.
- Well-designed programs are considered “high quality” and are often regarded as a step toward creating more sophisticated systems with less maintenance cost and downtime.
- Computer programming can be applied to many different fields of human endeavor including business and management, science, engineering and medicine.
- Computer programmers are very important in the scientific world in finding out all the possible problems or solutions that may arise because of some program written by someone else. Without computer programming scientists would have had a lot harder time to discover all the final results they come up with.
Units Studied Under Computer Programming
- Data Structures
- Operating Systems & Compilers
- Artificial Intelligence (AI)
- Distributed systems and E-Commerce
- Computer Networking & Security
- Database Systems
- Security of Computer Networks, Communication and Information Systems
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