The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics.Its exact value is defined as 299 792 458 metres per second (approximately 300 000 km/s, or 186 000 mi/s).It is exact because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time interval of 1 ⁄ 299 792 458 second. C++ is a middle-level programming language developed by Bjarne Stroustrup starting in 1979 at Bell Labs.C++ runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX. Many higher-order organisms possess a chain of 104 amino acids. Studio 4°C Co., Ltd. (株式会社スタジオよんどしい, Kabushiki-Gaisha Sutajio Yondo Shī, stylized as STUDIO4℃) is a Japanese animation studio founded by Eiko Tanaka and Koji Morimoto in 1986. Data types in c refer to an extensive system used for declaring variables or functions of different types. The C Programming Language (sometimes termed K&R, after its authors' initials) is a computer programming book written by Brian Kernighan and Dennis Ritchie, the latter of whom originally designed and implemented the language, as well as co-designed the Unix operating system with which development of the language was closely intertwined. Assigns values from right side operands to left side operand C = A + B will assign the value of A + B to C += Add AND assignment operator. The symbol in the International Phonetic Alphabet that represents this sound is c , and the equivalent X-SAMPA symbol is c.. The digraph ck is often used to represent the sound / k / after short vowels, like "wicket". Air conditioning, technologies for altering the temperature and humidity of air; Alternating current, a type of electrical current in which the current repeatedly changes direction C was originally first implemented on the DEC PDP-11 computer in 1972. 켄 톰슨은 bcpl언어를 필요에 맞추어 개조해서 "b"언어(언어를 개발한 벨 연구소의 b를 따서)라 명명했고, 데니스 리치가 이것을 개선하여 c 언어가 탄생했다. Air conditioning can be used in both domestic and commercial environments. The C also has the implication that forms an "ABC" parallel situation with Airbus and Boeing. C is the eleventh least frequently used letter in the English language (after G, Y, P, B, V, K, J, X, Q, and Z ), with a frequency of about 2.20% in words. C - Strings - Strings are actually one-dimensional array of characters terminated by a null character '\0'.

In other languages, it represents the voiceless postalveolar affricate /t͡ʃ/ (like ch in English chalk ): Friulian ( c cun cedilie) before a , o , u or at the end of a word.

The last chapter explained the standard input and output devices handled by C programming language.