Lesson 5.4 · Trace it

Trace: Java reverse

Java code9 rows to fill3 marks

Complete the trace table for this Java code. word.charAt(i) is the character at index i, counting from 0. i-- takes 1 away from i, the opposite of i++, so this loop counts down. [3]

Line 1: String word = "cab";1String word = "cab";
Line 2: String result = "";2String result = "";
Line 3: for (int i = word.length() - 1; i >= 0; i--) {3for (int i = word.length() - 1; i >= 0; i--) {
Line 4, indented 1 level: result = result + word.charAt(i);4    result = result + word.charAt(i);
Line 5: }5}
Line 6: System.out.println(result);6System.out.println(result);

Fill in one row each time a line changes i or result, or prints something. The table already has the right number of rows. In each row, write only what that line changes; you can leave the other cells empty or copy their values down. Write values the way Java shows them: 3 and 3.0 are different, and text goes in quotes. In the output column, write exactly what appears on screen, with no quotes around it.

Row	i	result	output
1
2
3
4
5
6
7
8
9