I plan to make a project that prints out every 3rd letter of a string value

Question

I get the StringIndexOutOfBoundsException when using while loops

Answer 1

using Jay Matthews sir comment :
for(int i=2; i<s.length(); i+=3)
System.out.print(s.charAt(i));

Answer 2

Jay Matthews I meant that the character will be printed for every 3 letters