fetching html that is actually a number, want to add 1 to it and replace it

Hi,

i'm trying to add 1 to a value that I fetched from my HTML using jquery.

At the moment it is appending 1, treating the value as a string.

From stackoverflow

• x = parseInt(x)+1 //assuming input in an integer
  

  or

  x = parseFloat(x)+1 //assuming input is non-integer
  

  You need to force a type conversion to integer from string.

  Paolo Bergantino : You should always specify the second argument of parseInt to avoid surprises.

• You want parseInt. You should provide a base argument, as Paolo mentions, for otherwise it may be interpreted as octal if it has a leading 0 (or hex, if it has a leading 0x).

  js> parseInt("1", 10)+1
  2
  js> parseInt("010")
  8
  js> parseInt("0x10")
  16
  

  Paolo Bergantino : You should always specify the second argument of parseInt to avoid surprises.

  Brian Campbell : @Paolo You're right, updated my answer to fix it

  Paolo Bergantino : removed downvote. :)

• You can cast a string to number, using the Number function, it will work whenever the number is a integer or a float:

  var i = Number(myValue) + 1;
  

• As requested (with jQuery)

  $('.vote-count-post').each(function() {
    var n = parseInt($(this).text(), 10)+1;
    $(this).text(n);
  });
  

  This will add one to the element text. In this case, adds one to all votes on this page! (works in firebug - too bad it's only on the page)

  Paolo Bergantino : Hahaha, I just put that into a loop and ran it 1000 times. Funny results.

  Jarret Hardie : Highly entertaining first thing in the morning!

• Be careful with parseInt! You should always specify the second argument, which is the base:

  $('div.c2 a').text(
     parseInt($('div.c2 a').text(),10)+1
  );