Java custom separator output for looping

Question

I've this for loop

for(int i=1; i <= bil; i++){
            if (i%2!=0)
            System.out.print(i+" ");
        }

and i want an output like this (if bil =5)

1, 3 and 5

So, how to get this output that have a comma separator and the last loop have different separator like 'and' ?

Answer 1

Here is one way of doing it:

StringBuilder buf = new StringBuilder();
int lastComma = 0;
for (int i = 1; i <= bil; i++) {
    if (i % 2 != 0) {
        if (buf.length() != 0) {
            lastComma = buf.length();
            buf.append(", ");
        }
        buf.append(i);
    }
}
if (lastComma != 0)
    buf.replace(lastComma, lastComma + 1, " and");
System.out.print(buf.toString());

Results with various values of bil

bil=1   ->  1
bil=2   ->  1
bil=3   ->  1 and 3
bil=4   ->  1 and 3
bil=5   ->  1, 3 and 5
bil=6   ->  1, 3 and 5
bil=7   ->  1, 3, 5 and 7
bil=8   ->  1, 3, 5 and 7
bil=9   ->  1, 3, 5, 7 and 9
bil=10  ->  1, 3, 5, 7 and 9