The Number.isInteger()
method determines whether the passed value is an integer.
Number.isInteger()
Try it
Syntax
Number.isInteger(value)
Parameters
-
value
-
The value to be tested for being an integer.
Return value
The boolean value true
if the given value is an integer. Otherwise false
.
Description
Examples
Using isInteger
Number.isInteger(0); // true Number.isInteger(1); // true Number.isInteger(-100000); // true Number.isInteger(99999999999999999999999); // true Number.isInteger(0.1); // false Number.isInteger(Math.PI); // false Number.isInteger(NaN); // false Number.isInteger(Infinity); // false Number.isInteger(-Infinity); // false Number.isInteger('10'); // false Number.isInteger(true); // false Number.isInteger(false); // false Number.isInteger([1]); // false Number.isInteger(5.0); // true Number.isInteger(5.000000000000001); // false Number.isInteger(5.0000000000000001); // true
Specifications
Specification |
---|
ECMAScript Language Specification # sec-number.isinteger |
Browser compatibility
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
isInteger |
34
|
12
|
16
|
No
|
21
|
9
|
≤37
|
34
|
16
|
21
|
9
|
2.0
|
1.0
|
0.12.0
|
See also
- Polyfill of
Number.isInteger
incore-js
- The
Number
object it belongs to.
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger