How to get comma separated output?

Question

in Java:any input(must be prime),it will return from 2,3,5...input
suppose
input=13
output:(2,3,5,7,11,13)

Answer 1

I got output using for loop and a inside if else loop for determining prime..but unable to get CSV output...

Answer 2

for me input 7
output:2
3
5
7

Answer 3

thank you Robin.