How to add two strings as if they were numbers? [duplicate]

Answer 1

try

var x = parseFloat(num1) + parseFloat(num2) ;

or, depending on your needs:

var x = parseInt(num1) + parseInt(num2) ;

http://www.javascripter.net/faq/convert2.htm

You might want to pick up the book Javascript: The Good Parts, by Douglas Crockford. Javascript has a rather sizeable colleciton of gotchas! This book goes a long way towards clarifying them. See also

• http://www.crockford.com/
• http://javascript.crockford.com/

and Mr. Crockford's excellent essay, Javascript: The World's Most Misunderstood Programming Language.