function main()
{	
	print( factorial(7) );
	return 0;
}

// Calculates the factorial
function factorial( var n )
{
	if ( n == 0 ) return 1;
	return n * factorial(n-1);
}

// Approximates sine based on Taylor expansion
function sineApprox( var val, var n )
{
	var i = 0;
	var result = 0.0;
	
	while ( i < n )
	{
		var x  = 2*i + 1;
		
		var sign = pow( -1.0, i );
		var num = pow( val, x );
		var denom = factorial(x);
		
		result = sign * num / denom;
		
		i = i + 1;
	}
	
	return result;
}

function pow( var val, var pow )
{
	if ( pow == 0 ) return 1;
	return val * pow( val, pow - 1 );
}