Question

Can someone tell me how to use addition in JavaScript ?

For example :

• I want to add 10 to an existing element class as “box” which contains an integer of 5.
• I want the JavaScript to add 10 to the number 5 and make it into 15.

Anyone can help me with this simple script?

Answer 1

Using jQuery:

// assuming that there are many divs with .box class
$("div.box").each(function(idx,elem){
  $(this).text( parseInt($(this).text(),10) +10 );
});

simple example on jsfiddle