WAP to understand setw() function.

//program to understand setw() function   //comment line
#include <iostream>              // header file to handle input and output
#include<stdlib.h>               //header file to handle return statement.
#include<iomanip>
#include<conio.h>
using namespace std;             //to handle all standard characters/functions,reserved words  used in program. we do not use in turboc++ compiler
int main()                       // main function as starting point of execution
{

    system("cls");                     // clears the screen. It exists in stdlib.h
    cout<<setw(17)<<"first line"<<endl;// setw creates a box of 17 widths to put given string
    cout<<setw(17)<<"second line"<<endl;//setw creates a box of 17 widths to put given string
    cout <<setw(17)<<"Hello world!" << endl;// cout is an object and is pre-defined. It is responsible for output stream. endl is to end the line.
                                   //<< is called insertion operator or put -to operator.
    return 0;                       // returns 0.
}