C language is a widely used computer programming language that is efficient, flexible, and portable. The development of C language can be traced back to the 1970s, developed by Dennis Ritchie at Bell Labs. The design goal of C language is to provide a concise and efficient programming language that can directly operate computer hardware and has good portability.

The characteristics of C language include
- Concise and Efficient: The syntax of C language is concise and clear, and the code execution efficiency is high.
- Strong Portability: The code of C language can run on different operating systems and hardware platforms with only a few modifications.
- Procedural Oriented: C language is a procedural programming language that emphasizes the process and logic of the program.
- Rich Operators and Data Types: C language provides a rich set of operators and data types to meet various programming needs.
- Low-level Operating Ability: C language can directly operate computer hardware, such as memory, registers, etc., to achieve efficient utilization of system resources.