Function isNaN
Test whether a value is NaN (not a number).
The function supports types number
, BigNumber
, Fraction
, Unit
and Complex
.
The function is evaluated element-wise in case of Array or Matrix input.
Syntax
isNaN(x)
Parameters
Parameter | Type | Description |
---|---|---|
x |
number | BigNumber | Fraction | Unit | Array | Matrix | Value to be tested |
Returns
Type | Description |
---|---|
boolean | Returns true when x is NaN. Throws an error in case of an unknown data type. |
Examples
isNaN(3); // returns false
isNaN(NaN); // returns true
isNaN(0); // returns false
isNaN(bignumber(NaN)); // returns true
isNaN(bignumber(0)); // returns false
isNaN(fraction(-2, 5)); // returns false
isNaN('-2'); // returns false
isNaN([2, 0, -3, NaN]'); // returns [false, false, false, true]