C89

C89, also known as ANSI C, is a standardized version of the C programming language established in 1989 by the American National Standards Institute (ANSI). It defines consistent rules for writing C programs to ensure portability and compatibility across different compilers and systems. C89 introduced features like function declarations, standard library functions, and syntax rules that programmers can rely on, making C more reliable and easier to use. This standard helped unify diverse C implementations and laid the foundation for future versions of the language.