- Preprocessor Commands
- Functions
- Variables
- Statements & Expressions
- Comments
#include <stdio.h>
int main()
{
/* my first program in C */
printf("Hello, World! \n");
return 0;
}
- The first line of the program #include <stdio.h> is a preprocessor command, which tells a C compiler to include stdio.h file before going to actual compilation.
- The next line int main() is the main function where the program execution begins.
- The next line /.../ will be ignored by the compiler and it has been put to add additional comments in the program. So such lines are called comments in the program.
- The next line printf(...) is another function available in C which causes the message "Hello, World!" to be displayed on the screen.
- The next line return 0; terminates the main() function and returns the value 0.
- Open a text editor and add the above-mentioned code.
- Save the file as hello.c
- Open a command prompt and go to the directory where you have saved the file.
- Type gcc hello.c -o hel.exe and press enter to compile your code.
- If there are no errors in your code, the command prompt will take you to the next line.
- Now, type hel to execute your program.
- You will see the output "Hello World" printed on the screen.