This article will guide you on steps to write your first C #program. Hello World! the program may seem useless and simple, but it is the best way to get started on learning how to program. By writing this yourself, you better under concepts that may otherwise seem abstract and vague. To run C program: Open #Command #prompt or Terminal(if you use #Ubuntu or Mac OS), and go to the directory where you have saved the hello. c program file. Now, to run the program, type in ./a. out and you will see Hello, World displayed on your screen. To compile and run a C program on Ubuntu Linux using the gcc compiler: 1. Open up a #terminal. Search for the terminal application in the Dash tool (located as the topmost item in the Launcher). 2. Use a text editor to create the C source code. 3. #Compile the program. 4. Execute the program.