java - The sum of all the multiples of 3 or 5 below N -

i have find sum of multiples of 3 or 5 below n. example if have list natural numbers below 10 multiples of 3 or 5, 3, 5, 6 , 9,the sum of these multiples 23.

now problem left want able read numbers display sum, reads 1 number , display sum right after it, ideas?

import java.io.bufferedreader; import java.io.ioexception; import java.io.inputstreamreader;  public class solution{ public static void main(string[] args) throws ioexception {       bufferedreader br = new bufferedreader(new inputstreamreader(system.in));     string line = br.readline();     int nbr = integer.parseint(line);           for(int j=0; j<nbr;j++)         {             bufferedreader br2 = new bufferedreader(new   inputstreamreader(system.in));             string line2 = br2.readline();             string[] numbers = new string[nbr];             numbers[j]= line2;             system.out.println(somme(long.parselong(numbers[j])));         }          }   public static long somme(long nn) {     long s = 0;     (int = 0; < nn; i++) {         if (((i % 3) == 0) || ((i % 5) == 0)) {             s = s + i;         }     }     return (s); } } 

i suggest use scanner. suggest add sum iterating 3 n in increments of 3. 5 n in increments of 5 (then exclude multiples of 3, because they've been added). like

public static void main(string[] args) {     scanner scanner = new scanner(system.in);     while (scanner.hasnextint()) {         int n = scanner.nextint();         system.out.println(getsum(n));     } }  public static long getsum(int n) {     long sum = 0;     (int = 3; < n; += 3) {         sum += i;     }     (int = 5; < n; += 5) {         if (i % 3 != 0) { // <-- added if divisible 3             sum += i;         }     }     return sum; } 

based on comment below, change main first read int of counts, store them in array. like

public static void main(string[] args) {     scanner scanner = new scanner(system.in);     while (scanner.hasnextint()) {         int toread = scanner.nextint();         int[] vals = new int[toread];         (int t = 0; t < toread; t++) {             if (scanner.hasnextint()) {                 vals[t] = scanner.nextint();             }         }         stringbuilder sb = new stringbuilder();         (int n : vals) {             sb.append(getsum(n)).append(" ");         }         system.out.println(sb);     } }