public class Lucas

{

public static void main ( String args [] )

{

System.out.println ("Which Lucas number would you like? ");

Scanner input = new Scanner ( System.in );

double num = input.nextDouble();

while ( num < 0 || num > 76 )



{

System.out.print ("Which Lucas number would you like? ");

num = input.nextInt();

}

System.out.printf ("Lucas #%d is %s\n", num, getLucas);

}

public static int getLucas(double result)

{

double pre = 2;

result = 1;

for ( int i = 0; i <= num; ++i )

{

int sum = result + pre;

pre = result;

result = sum;

}

return result;

}

}