What does the following code output?
public class Main { public static void main(String[] args) { String l = ""; while (l.length() != 3) l+="ab"; System.out.println(l); } }
A.ab B.abab C.The loop completes with no output. D.This is an infinite loop.
D.
Immediately after letters is initialized, the loop condition is checked.
The variable letters is of length 0, which is not equal to 3, so the loop is entered.
In the loop body, letters becomes length 2 and contains "ab".
The loop index is checked again and now 2 is not equal to 3.
The loop is entered and letters becomes length 4 with contents abab.
Then the loop index is checked again.
Since the length 4 is not equal to 3, the loop body is entered again.
This repeats for 6, 8, 10, etc.
The loop never ends, and Option D is correct.