Code example:

var add $=$ function$($ x$,$ y $)\{$

return $($ x $+$ y $)$;

$\}$

alert$($ add $(5,3))$;

$($Refer to code example above$)$ The alert method in this example

Code example:

var add $=$ function$($ x$,$ y $)\{$

return $($ x $+$ y $)$;

$\}$

alert$($ add $(5,3))$;

$($Refer to code example above$)$ The alert method in this example

displays a dialog box with a value of $8.$

does not display a dialog box.

displays a dialog box with a value of $5,3.$

displays a dialog box with a value of $$x $+$ y$.$