Number.isInteger()
The Number.isInteger()
method determines whether the
passed value is an integer.
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
If the target value is an integer, return true
, otherwise return
false
. If the value is NaN
or Infinity
, return
false
. The method will also return true
for floating point
numbers that can be represented as integer.
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
BCD tables only load in the browser
See also
- Polyfill of
Number.isInteger
incore-js
- The
Number
object it belongs to.