int x = 1;
println(x); // Prints "1" to the console
x += 5; // Equivalent to x = x + 5
println(x); // Prints "6" to the console

int y = 1;
println(y); // Prints "1" to the console
y -= 5; // Equivalent to y = y - 5
println(y); // Prints "-4" to the console