Test if string is Integer with Jquery

Question

what is the function which test if a string is an Integer or not like the method :

jQuery.isNumeric()

i want to test an input html element :

<input id='distance' type='text' />

thank you in advance

possible duplicate of Check a value is float or int in jquery And this stackoverflow.com/questions/3885817/… — Dan
– Dan, Commented Sep 11, 2014 at 13:37
@Dan It's not a duplicate of that. That question is about deciding which it is, int or float. This question just wants to know if it's any kind ofnumber. — Barmar
– Barmar, Commented Sep 11, 2014 at 13:38
Ok well there seem to be plenty of questions on this already - here's another similar one: stackoverflow.com/questions/600763/… and another stackoverflow.com/questions/1272696/… — Dan
– Dan, Commented Sep 11, 2014 at 13:39
the case for the function isNumeric() are : api.jquery.com/jquery.isnumeric but i am asking how can i test if it is integer or not — Bouraoui KACEM
– Bouraoui KACEM, Commented Sep 11, 2014 at 13:42

Bouraoui KACEM · Accepted Answer · 2014-09-11 13:52:21Z

9

thank you for your contributions i found the answer :

if(Math.floor($('#distance').val()) == $('#distance').val() && $.isNumeric($('#distance').val()))
 { 
 alert('yes its an int!');
 }

answered Sep 11, 2014 at 13:52

Bouraoui KACEM

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2 Comments

Jasmel Pc Over a year ago

how it could be possible if it returns the alert for the input 876ffff654?? This is not true.

Bouraoui KACEM Over a year ago

@LeaveCover give us the test link please

Blake · Accepted Answer · 2016-01-12 17:49:56Z

-1

I use this

function IsInteger(n){
    return Number(n) === n && n % 1 === 0;
}

answered Jan 12, 2016 at 17:49

Blake

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4 Comments

Louis Barranqueiro Over a year ago

A code block alone does not provide a good answer. Please add explanations (why it solve the issue, where was the mistake, etc...)

Blake Over a year ago

OK Number(n) returns NaN, so if 'not a number' it won't equal n. The n % 1 will return 0 if an integer. Something else mean you have a float

Bouraoui KACEM Over a year ago

IsInteger("555445")===> result =false

J Adam Rogers Over a year ago

If function is updated to the following, it would work for passing in string input. function IsInteger(n){ return Number(n) == n && n % 1 === 0; } Using "==" instead of "===" so "555445" == 5554455 will result in true.

Techy · Accepted Answer · 2014-09-11 13:57:49Z

-4

sorry I didn't notice integer when I answered, here is another type check:

if($.type($(#distance).val())==="number")

please see: http://api.jquery.com/jquery.type/

answered Sep 11, 2014 at 13:57

Techy

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1 Comment

Bouraoui KACEM Over a year ago

it returns "string" and not "number" because the input element has the attribute : type=text

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