mathjs/docs/reference/functions/unary.md

Function unary

Inverse the sign of a value, apply a unary minus operation.

For matrices, the function is evaluated element wise. Boolean values will be converted to a number. For complex numbers, both real and complex value are inverted.

Syntax

math.unary(x)

Parameters

Parameter	Type	Description
x	Number | BigNumber | Boolean | Complex | Unit | Array | Matrix	Number to be inverted.

Returns

Type	Description
Number | BigNumber | Complex | Unit | Array | Matrix	Returns the value with inverted sign.

Examples

var math = mathjs();

math.unary(3.5);      // returns -3.5
math.unary(-4.2);     // returns 4.2

See also

add, subtract