Form a number system with only 3 and 4. I couldn't figure out why...Help me Coders

Question

Find the nth number of the number system.

Example —> 3, 4, 33, 34, 43, 44, 333, 334, 343, 344, 433, 434, 443, 444 and so on.
plz try to make my code work rather than suggesting other methods

import java.util.*;
import static java.lang.System.*;
public class numb {

public static void main(String[] args) {
int num,c;
int i;
Scanner in = new Scanner(System.in);

out.println("How many elements u need to put in this array?");
num=in.nextInt();
int[] ray1 = new int[num];
List<String> l1 = new LinkedList<String>();
for (c=0;c<num;c++)
{

ray1[c]=c;
}

for(i=0;i<num;i++)
{
if(ray1[i]%10==3||ray1[i]%10==4)
{

String ad = String.valueOf(ray1[i]);

l1.add(ad);

}
}
printme(l1);

}

public static void print (int[] array)
{
for(int xc:array)
out.println(xc);
}
public static void printme (List<String> l1)
{
for(String yc:l1)
out.println(yc);
}

}

I can only get the numbers with 3's and 4's on the unit's place

Answer 1

Should be % 10 to match numbers ending in 3, at the moment it will only match the number 3