Function isNegative #

Test whether a value is negative: smaller than zero. The function supports types number, BigNumber, Fraction, and Unit.

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

Syntax #

math.isNegative(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 larger than zero. Throws an error in case of an unknown data type.

Examples #

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

See also #

isNumeric, isPositive, isZero, isInteger

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