Introduction

Compiling a Simple Program

#include<iostream> - read the file iostream that contains the definition for the stream input/output package.
using namespace std; - all names in the program belong to the "standard namespace"
int main () { ... } defines a function called main. A function is a collection of instructions that carry out a particular task.
The statements (instructions) inside the body (inside the curly braces { ... }) of the main function are executed one by one.
Each statement ends with a semicolon ;
The sequence of characters enclosed in quotations marks ("Hello, World\n") is called a string.
- Escape sequence\n indicates a newline.
- Use \" to display quotes.
return denotes the end of the main function. The zero value is a signal that the program ran successfully.