[Java] Please help me to understand why the code below returns 0 1 2 3 4, not 0 1 2 3 despite x < 4 ?

class Test

{

public static void main(String args[])

{

int x;

for (x = 0; x < 4; x++)

{

System.out.println(x);

}

System.out.println(x);

}

}