C "Hello, World!" Program

Program to Display "Hello, World!"

#include <stdio.h>
int main() {
   // printf() displays the string inside quotation
   printf("Hello, World!");
   return 0;
}

Output

Hello, World!

How "Hello, World!" program works?

• The #include is a preprocessor command that tells the compiler to include the contents of stdio.h (standard input and output) file in the program.
• The stdio.h file contains functions such as scanf() and printf() to take input and display output respectively.
• If you use the printf() function without writing #include <stdio.h>, the program will not compile.
• The execution of a C program starts from the main() function.
• printf() is a library function to send formatted output to the screen. In this program, printf() displays Hello, World! text on the screen.
• The return 0; statement is the "Exit status" of the program. In simple terms, the program ends with this statement.