C++ Syntax

C++ Syntax

Let's break down a simple C++ program to understand its syntax. Every C++ program consists of statements that the computer will execute.

A Simple C++ Program

Here is the classic "Hello World" program in C++:

#include <iostream>
using namespace std;

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

Line-by-Line Explanation

• #include <iostream>: This is a header file library that lets us work with input and output objects, such as cout.
• using namespace std: This means that we can use names for objects and variables from the standard library.
• int main(): This is the main function. Any code inside its curly brackets {} will be executed when the program runs.
• cout << "Hello World!";: cout (character output) is used to print text to the screen. Every C++ statement must end with a semicolon ;.
• return 0;: This ends the main function and returns 0, indicating that the program ran successfully.

Remember, C++ ignores white space, but standard indentation makes code easier to read.