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
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possible duplicate of Check a value is float or int in jquery And this stackoverflow.com/questions/3885817/…Dan– Dan2014-09-11 13:37:12 +00:00Commented Sep 11, 2014 at 13:37
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That's the function. What else do you need to know?Barmar– Barmar2014-09-11 13:37:14 +00:00Commented Sep 11, 2014 at 13:37
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@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– Barmar2014-09-11 13:38:39 +00:00Commented Sep 11, 2014 at 13:38
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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– Dan2014-09-11 13:39:47 +00:00Commented Sep 11, 2014 at 13:39
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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 notBouraoui KACEM– Bouraoui KACEM2014-09-11 13:42:28 +00:00Commented Sep 11, 2014 at 13:42
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3 Answers
thank you for your contributions i found the answer :
if(Math.floor($('#distance').val()) == $('#distance').val() && $.isNumeric($('#distance').val()))
{
alert('yes its an int!');
}
2 Comments
Jasmel Pc
how it could be possible if it returns the alert for the input 876ffff654?? This is not true.
Bouraoui KACEM
@LeaveCover give us the test link please
I use this
function IsInteger(n){
return Number(n) === n && n % 1 === 0;
}
4 Comments
Louis Barranqueiro
A code block alone does not provide a good answer. Please add explanations (why it solve the issue, where was the mistake, etc...)
Blake
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
IsInteger("555445")===> result =false
J Adam Rogers
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.
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/
1 Comment
Bouraoui KACEM
it returns "string" and not "number" because the input element has the attribute : type=text