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 #

math.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 #

math.isNaN(3)                     // returns false
math.isNaN(NaN)                   // returns true
math.isNaN(0)                     // returns false
math.isNaN(math.bignumber(NaN))   // returns true
math.isNaN(math.bignumber(0))     // returns false
math.isNaN(math.fraction(-2, 5))  // returns false
math.isNaN('-2')                  // returns false
math.isNaN([2, 0, -3, NaN]')      // returns [false, false, false, true]

See also #

isNumeric, isNegative, isPositive, isZero, isInteger

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