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# C (programming language)

The C programming language is a computer programming language that was developed to do system programming for the operating system UNIX and is an imperative programming language. C was developed in the early 1970 by Ken Thompson and Dennis Ritchie. It is a procedural language, which means that people can write their programs as a series of step-by-step instructions. C is a compiled language.

Because the ideas behind C are kept close to the design of the computer, the compiler (program builder) can generate instructions for the computer that will run very fast. The reason its is so fast is because it builds the program in machine code/native code. This makes C a good language for writing operating systems. Many operating systems, including Linux and UNIX, are programmed using this language. The language itself has very few keywords, and most things are done using libraries, which are collections of code for them to be reused.

C is available for many different types of computers. This is why C is called a "portable" language. A program that is written in C and that respects certain limitations can be compiled for many different platforms.

The syntax of C has also influenced many other programming languages, such as C++, C#, and Java, and many more programming languages we use nowadays.

## Example code

Here is an example of a program written in C. When built and run, it will show "Hello world!", followed by a new line. on the computer screen.

#include <stdio.h>
// This is a comment, ignored by the computer
int main(void) { // Here the starting point of the program is defined
printf("Hello world!\n"); // Actual process
return EXIT_SUCCESS; // Tell everyone that we had success
}