CC Syntax

C Syntax

You have already seen the following code a couple of times in the first chapters. Let's break it down to understand it better:

#include 

int main() {
  printf("Hello World!");
  return 0;
}

Example explained

Line 1: #include <stdio.h> is a header file library that lets us work with input and output functions, such as printf(). Header files add functionality to C programs.

Line 3: int main() is the main function. Any code inside its curly brackets {} will be executed.

Line 4: printf() is a function used to output/print text to the screen. In our example it will output "Hello World!".

Line 5: return 0 ends the main function.

Line 6: Do not forget to add the closing curly bracket } to actually end the main function.

#include <stdio.h>

int main() {
  printf("Hello World!");
  return 0;
}

#include <stdio.h>

int main() {
  printf("Hello World!");
  printf("Have a good day!");
  return 0;
}