C language is one of the most popular general-purpose programming language  operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.
Key features:

• Structured Programming
• Popular system programming language
• UNIX, MySQL and Oracle are completely written in C.
• Supports variety of platforms
• Efficient and also handle low-level activities.
• As fast as assembly language and hence used as system development language.