$4.$ For the following Java code segment, explain why the output is $$x is not equal to y$.$

double x $=1\mathrm{.}0-0\mathrm{.}1-0\mathrm{.}1-0\mathrm{.}1-0\mathrm{.}10\mathrm{.}1$;

double y $=0\mathrm{.}5$;

if $($x $==$ y$)\{$

System.out.println$("$x is equal to y$")$;

$\}$

else $\{$

System.out.println$("$x is not equal to y$")$;

$\}$

Output:

x is not equal to y