Informal Code Analysis (Loop Tracing)

AP Computer Science A· difficulty 4/5

String result = "";
for (int i = 1; i <= 3; i++) {
  for (int j = 1; j <= i; j++) {
    result += "*";
  }
  result += "|";
}
System.out.println(result);

What is printed?

A
$ | | ***|$
B
$ | | |$
C
$ | |*|$
D
$ | | |$
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Explanation

For i=1: one " <em> ", then "|". For i=2: two " </em> ", then "|". For i=3: three " <em> ", then "|". Result: " </em> | <strong> | </strong> *|".

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