Nested Iteration

AP Computer Science A· difficulty 3/5

for (int i = 0; i < 3; i++) {
    for (int i = 0; i < 3; i++) {
        System.out.println("x");
    }
}

What is wrong?

A
$Compile-time inference fails$
B
$Nothing is wrong$
C
$Both loops share i and run nine times correctly$
D
$Inner loop redeclares i; that variable is already in the enclosing scope$
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Explanation

Java disallows declaring a variable with the same name as one already in an enclosing block. Rename the inner variable, e.g., j.

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