#include <iomanip>??

[atjm88]

#include <iostream>
#include <iomanip>
#include <conio>

int main()
{
	cout<<"\n\t Multiplication Tables";
   cout<<"\n______________________________________\n\n";
   // print multiplication table for 1
   for (int j=1; j<=10; j++)
   {
   	cout<<setw(4)<<j*1;
   }
   	cout<<endl;

   //print multiplication table for 2
   for (int j=1; j<=10; j++)
   {
   	cout<<setw(4)<<j*2;
   }
   	cout<<endl;
getch();
return 0;
}

Hi, may i know what is the usage of this library? #include <iomanip>

[Wisely Done]

Here, it is included so you can use the function setw.

[atjm88]

Thanks...And the full name of that header is? Input Output Manipulation? Or something else? TQ...

[Stewbond]

Pretty much.

http://cplusplus.com/reference/iostream/
This contains the list of IO manipulators. <iomanip> is required for most of those.