mathjs/docs/reference/functions/isNumeric.md

Function isNumeric

Test whether a value is an numeric value.

The function is evaluated element-wise in case of Array or Matrix input.

Syntax

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

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, isPositive, isNegative, isInteger