Question: What will this small program output? class Main { } private static void foo(int x) { } System.out.println(x); public static void main(String[] args) {

What will this small program output? class Main { } private static void foo(int x) { } System.out.println(x); public static void main(String[] args) { } int x = 15; foo(x); x = 18;

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