Variables and Data Types

AP Computer Science A· difficulty 4/5

public static void inc(int x) {
    x = x + 1;
}
// caller: int n = 5; inc(n); System.out.println(n);

What is printed and why?

A
$Compile error$
B
$6; n is incremented in place$
C
$0; n is reset$
D
$5; primitives are passed by value, so the caller's n is unchanged$
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Explanation

Java passes primitives by value. inc receives a copy; modifying x does not affect n in the caller.

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