In computing C is a general-purpose programming lanuguage initially developed by Deniis Ritchie.Its Design Provides Constrcits that map effieciently to typical instructions, and therefore it has found lasting use in application that had formerly been coden in assembly language,most notably system software like the Unix computer operating syste.C is one of the most widely used programming languages of all time and many later languages of all time and many later languages have borrowed directly from C,including C++,C#,JavaScript,Perl,PHP and Unix's C shell etc.