CODEWITHSUNDEEP
javascriptalert
Mohammad Saberi
Mohammad Saberi

Reputation: 13166

Why does JavaScript display 01002004 as 6295553?

I have the codes below:

<script type="javascript">
   var item = 001002004;
   alert(item);
</script>

Whenever I see this page in view source in my web browser, I see these lines of code exactly as same as here. But when alert() function runs, I see an unknown message. It alrest '6295553'. I don't know where is this unknown value from. I'm sure anything don't happen to item and it did not change before of alert.

What do you think ? What's the problem ?

Upvotes: 2

Views: 110

Answers (4)

Selvakumar Arumugam
Selvakumar Arumugam

Reputation: 79830

Any number prefixed with 0 will be considered as octal. and 0x for hexa decimal

I am guessing that you are having it as an numeric value like below or using parseInt function to parse the string and when you alert it you see a different value..

var item = 001002004;
alert(item);

Or probably you are doing something like below

var item = '001002004';
alert(parseInt(item));

See more details on parseInt @MDN

DEMO HERE

Upvotes: 5

Hogan
Hogan

Reputation: 70538

are you sure you are not changing the variable -- maybe with a cap. eg

   var item = 'some value';
   alert(Item);

Upvotes: 0

KooiInc
KooiInc

Reputation: 122936

Try changing the script type to "text/javascript" <script type="text/javascript">, or don't use the type attribute at all. See this jsfiddle

Upvotes: 1

hrishikeshp19
hrishikeshp19

Reputation: 9026

http://jsfiddle.net/3jK2v/

Please have a look at above fiddle. It does not alert anything anomalous for me.

Upvotes: 0

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