FindMissingNumber

/*Find out sum of n numbers and substract the sum of numbers from this sum.
 *
 *
 */
public class FindNumber {

    public static void main(String [] args)
    {
        int totalsum=10*(10+1)/2;
        int givensum=0;
        int [] a={1,4,3,2,5,7,9,8,10};
        for(int i=0;i<a.length;i++)
        {
            givensum +=a[i];
        }
        int missingnum=totalsum-givensum;
        System.out.println(" Missing number is :"+missingnum);
    }
}