JavaScript Number.isInteger() Method
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JavaScript Number.isInteger() Method
The Number.isInteger() method returns a Boolean value indicates whether the passed value is an integer.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
var result = Number.isInteger(1.5);
document.write(result);
</script>
</body>
</html>
Syntax
Number.isInteger(value)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| value | Required | The value to be tested for being an integer. |
Return Value
| Value | Explanation |
|---|---|
| true | If the given value is integer. |
| false | If the given value is not an integer. |
More Examples
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
document.write(Number.isInteger(0) +": 0 <br>");
document.write(Number.isInteger(1) +": 1 <br>");
document.write(Number.isInteger(-25) +": -25 <br>");
document.write(Number.isInteger(99999999999) +": 99999999999 <br><br>");
document.write(Number.isInteger(true) +": true <br>");
document.write(Number.isInteger(false) +": false <br>");
document.write(Number.isInteger('65') +": '65' <br>");
document.write(Number.isInteger(1.5) +": 1.5 <br>");
document.write(Number.isInteger([5]) +": [5] <br>");
document.write(Number.isInteger(NaN) +": NaN <br>");
document.write(Number.isInteger(Infinity) +": Infinity <br>");
document.write(Number.isInteger(-Infinity) +": -Infinity <br>");
document.write(Number.isInteger(null) +": null <br>");
</script>
</body>
</html>
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