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