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mathjs

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Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

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<!-- Note: This file is automatically generated from source code comments. Changes made in this file will be overridden. --> # Function isInteger Test whether a value is an integer number. The function supports `number`, `BigNumber`, and `Fraction`. The function is evaluated element-wise in case of Array or Matrix input. ## Syntax ```js math.isInteger(x) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `x` | number &#124; BigNumber &#124; Fraction &#124; Array &#124; Matrix | Value to be tested ### Returns Type | Description ---- | ----------- boolean | Returns true when `x` contains a numeric, integer value. Throws an error in case of an unknown data type. ## Examples ```js math.isInteger(2) // returns true math.isInteger(0) // returns true math.isInteger(0.5) // returns false math.isInteger(math.bignumber(500)) // returns true math.isInteger(math.fraction(4)) // returns true math.isInteger('3') // returns true math.isInteger([3, 0.5, -2]) // returns [true, false, true] math.isInteger(math.complex('2-4i') // throws an error ``` ## See also [isNumeric](isNumeric.md), [isPositive](isPositive.md), [isNegative](isNegative.md), [isZero](isZero.md)