C Programming Language Tutorial
Variables and Data Types
Input/Output
Looping and Selection Structures
Array
Functions
Preprocessing Command
Pointer
Structure
File Operations
Important Knowledge
The first program usually written in the C programming language is the "Hello, World!" program. This program simply outputs the text "Hello, World!" to the screen.
Here's an example of how to write the "Hello, World!" program in C:
#include <stdio.h>
int main() {
printf("Hello, World!\n");
return 0;
}
In this example, we use the printf function to output the string "Hello, World!" to the screen. The \n at the end of the string represents a newline character, which adds a new line after the text is output.
The main function is a special function in the C programming language that is the entry point of a C program. When the program is run, the main function is executed first.
The return statement at the end of the main function indicates the exit status of the program. A return value of 0 indicates that the program ran successfully, while a non-zero value indicates an error or abnormal termination.
When the program is compiled and run, the output should be:
Hello, World!
This simple program serves as a basic introduction to the syntax and structure of a C program, and is often used as a starting point for learning the C programming language.