adding numbers from array?

Question

i have:

var str="100px";
var number = str.split("px");
number = number[0];

var km = "100px";
var numberk = km.split("px");
numberk = numberk[0];

var gim = numberk+100;
var kim = number+100;
var fim = number+numberk;
document.write(gim+'<br>'+kim+'<br>'+jim+'<br>');

i would be thankfull if someone could me answere why the result are added like string rather than nummerical number in javascript i have used the isNaN(); function which shows this as a legal number. So how can this problem be solved.

thanks.

I seem to remember reading that jQuery can be used to add numbers... — Adam Rackis
– Adam Rackis, Commented Dec 27, 2011 at 17:02

Darin Dimitrov · Accepted Answer · 2011-12-27 16:58:17Z

2

You could use the parseInt function in order to convert the string returned when spliting into integer:

number = parseInt(number[0], 10);
numberk = parseInt(numberk[0], 10);

Now the 2 variables are integers and you could perform integer operations on them.

answered Dec 27, 2011 at 16:58

Darin Dimitrov

1.0m275 gold badges3.3k silver badges3k bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Jeff B · Accepted Answer · 2011-12-27 16:58:21Z

2

You need to put parseInt() around each number before you use it. In fact, you could do this without removing the "px".

 gim = parseInt(km) + 100;

answered Dec 27, 2011 at 16:58

Jeff B

30.1k7 gold badges64 silver badges91 bronze badges

Comments

dku.rajkumar · Accepted Answer · 2011-12-27 17:17:35Z

1

simplest way to do this, you don't need to use split.

var str="150px";
var str1 = (parseInt(str)+100)+"px";
alert(str1);

OUTPUT:

200px

fiddle : http://jsfiddle.net/Kk3HK/1/

edited Dec 27, 2011 at 17:17

answered Dec 27, 2011 at 17:11

dku.rajkumar

18.6k8 gold badges43 silver badges58 bronze badges

Comments

Gabe · Accepted Answer · 2011-12-27 16:58:41Z

0

use parseInt()

var number = parseInt(str, 10);
var numberk = parseInt(km, 10);

answered Dec 27, 2011 at 16:58

Gabe

50.6k29 gold badges147 silver badges182 bronze badges

Comments

gen_Eric · Accepted Answer · 2011-12-27 16:59:08Z

0

Use parseInt to convert the string to a number.

var str = "100px";
var number = parseInt(str, 10);

parseInt stops when it finds the first non-number character, so you don't even need to remove the "px".

answered Dec 27, 2011 at 16:59

gen_Eric

228k42 gold badges304 silver badges343 bronze badges

Comments

Nikola K. · Accepted Answer · 2012-07-27 16:34:13Z

0

Wrap the numbers in parseInt().

edited Jul 27, 2012 at 16:34

Nikola K.

7,15313 gold badges33 silver badges39 bronze badges

answered Dec 27, 2011 at 16:58

powerbuoy

12.9k10 gold badges51 silver badges85 bronze badges

Collectives™ on Stack Overflow

adding numbers from array?

6 Answers 6

Comments

Comments

Comments

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

6 Answers 6

Comments

Comments

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related