Like most procedural languages in the ALGOL tradition, C has facilities for structured programming and allows lexical variable scope and recursion. Its static type system prevents unintended operations. In C, all

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Early developments
The origin of C is closely tied to the development of the Unix operating system, originally implemented in assembly language on a PDP-7by Dennis Ritchie and Ken Thompson, incorporating several ideas from colleagues.

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C has a formal grammarspecified by the C standard. Line endings are generally not significant in C; however, line boundaries do have significance

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The "hello, world" example, which appeared in the first edition of K&R, has become the model for an introductory program in most programming textbooks. The program prints "hello, world" to the standard output, which is usually a terminal or screen display.

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One of the most important functions of a programming language is to provide facilities for managing memory and the objects that are stored in memory. C provides three distinct ways to allocate memory for objects:
• Static memory allocation

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The C programming language uses librariesas its primary method of extension. In C, a library is a set of functions contained within a single "archive" file. Each library

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The type system in C is static and weakly typed, which makes it similar to the type system of ALGOL descendants such as Pascal. There are built-in types for integers of various sizes, both

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