mathjs/docs/reference/functions/isInteger.md

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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 #

math.isInteger(x)

Parameters #

Parameter	Type	Description
x	number | BigNumber | Fraction | Array | 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 #

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, isPositive, isNegative, isZero