Please help explain this calculator code.

var calculator = {
sum: 0,
add: function(value) {
this. sum = this. sum + value;

},
clear: function() {[]
this. sum = 0;

},
equals: function() {
return this. sum;

}
}

Effective character encoding requires standardized code. compatible browsers. common languages. identical operating systems.

While inserting images, the picture command is usually used to insert photos from a digital camera, and the clip art command is usually used to a.edit the sizes and other characteristics of photos that have been inserted. b.take a screenshot of an image and copy it to the clipboard for pasting. c.search for drawings or other images from a library of prepared pictures. d.make illustrations using lines and shapes that are easy to manipulate.

To maintain clarity and focus lighting might be needed