# Function isNumeric Test whether a value is an numeric value. The function is evaluated element-wise in case of Array or Matrix input. ## Syntax ```js math.isNumeric(x) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `x` | * | Value to be tested ### Returns Type | Description ---- | ----------- boolean | Returns true when `x` is a `number`, `BigNumber`, `Fraction`, or `boolean`. Returns false for other types. Throws an error in case of unknown types. ## Examples ```js math.isNumeric(2); // returns true math.isNumeric(0); // returns true math.isNumeric(math.bignumber(500)); // returns true math.isNumeric(math.fraction(4)); // returns true math.isNumeric(math.complex('2-4i'); // returns false math.isNumeric('3'); // returns false math.isNumeric([2.3, 'foo', false]); // returns [true, false, true] ``` ## See also [isZero](isZero.md), [isPositive](isPositive.md), [isNegative](isNegative.md), [isInteger](isInteger.md)