Shoutbox

hi all, i want convert strings to numbers
i´m using this
var number1='5';
var number2='4';
var result=number1+number2;
Messenger.MyPersonalMessage=result
but the result is 54, and not 9. why ?
how can i convert '5' to 5 ?

quote:

---

var number1='5';
var number2='4';
var result=number1+number2;
...
but the result is 54, and not 9. why ?

---

To answer your question for your specific example: because you have indicated the values are strings by using single quotes.  Remove the quotes and try the following:

code:

---

var number1 = 5;
var number2 = 4;
var result = number1 + number2;

---

Now you should be getting 9 as the result. 

Of course, you won't always be able to do this when your values are coming from somewhere else and happen to be strings.  When that happens you will want to check out parseInt() and parseFloat():

code:

---

var number1 = '5';
var number2 = '4';
var result = parseInt(number1) + parseInt(number2);

---

This should yield 9 as well.

In addition to that, a trick I tend to use is:

js code:

---

var number1 = '5';
var number2 = '4';
var result = (number1 * 1) + (number2 * 1);

---

The brackets shouldn't be needed, but I use them anyway

quote:

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Originally posted by Spunky

js code:

---

var result = (number1 * 1) + (number2 * 2);

---

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shouldnt the second one be * 1 still?

Yeah, I was in a rush going out...