C is a static, structured programming language featuring recursion that was designed to be hardware-friendly. It is used widely to create operating systems like Windows as well as applications for supercomputers, embedded devices, and more. Basic C commands include header files, main functions, comments, input/output functions, and formatting specifiers. Key applications of C include operating systems, serving as an intermediate language, developing new programming languages, and creating embedded systems code due to its speed, portability, and low-level access. Students can get help with C programming assignments online from experts anytime.