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By using much fewer commands than most programming languages, the C language makes it easy to create compilers that can translate a C program into machine language. Because it’s so much easier to create C compilers than it is to create compilers for other programming languages, you can find a C compiler for nearly every computer and operating system.

Theoretically, this means it’s possible to take a C program, written on Windows, copy it to another computer and operating system, and run that program on a different operating system, like Linux or macOS, with little or no modifications. When you can copy and run a program on multiple computers and operating systems, the program and the language it’s written in are portable.

So, not only does C create small, fast, and efficient programs, but C also allows you to copy and run your program on different operating systems and computers. Given all these advantages, the C language remains popular despite its age (it was created in 1972).