if( grade >=90 )
	{
		cout << "A";
	}
	else if( grade >= 80 && grade < 90 )
	{
		cout << "B";
	}
	else if( grade >= 70 && grade < 80 )
	{
		cout << "C";
	}
	else if( grade >= 60 && grade < 70 )
	{
		cout << "D";
	}
	else
	{
		cout << "F";
	}

////////////////////////////////////////////////////
#include<math.h>

abs( int ) the answer is another integer
fabs( float ) 
fabs( double )

double - a floating point number with 8 bytes


increment operator ++
decrement operator --

row += 3;  row = row + 3;


#include<iomanip>
setw(#) - to set column widths


flag - indicator to do/not do something (true or false)

text alignment
left flag
right flag

by default nether is on and it aligns right


//////////////////////////////////////////

void main ()
{
	int row = 1;
	int column = 1;


	while(row < 15)
	{
		column = 1;
		while(column < 15)
		{
			cout << setw(4) << row * column;
			column++;
		}
		cout << endl;
		row++;
	}

}