In the formatting examples from the chapter, we always provided a fixed control string,...

In the formatting examples from the chapter, we always provided a fixed control string, such as

System.out.format("%4d", 23);

It is possible, however, to dynamically create the control string, as in

int i = 4;

System.out.format("%" + i + "d", 23);

Using this idea of dynamically creating a control string, write a code fragment that outputs 50 X’s, using a separate line for each X. An X on a single line is preceded by two more leading spaces than the X on the previous line. The following figure shows the output for the first five lines.