mathjs/docs/reference/functions/not.md

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Function not #

Logical not. Flips boolean value of a given parameter. For matrices, the function is evaluated element wise.

Syntax #

math.not(x)

Parameters #

Parameter	Type	Description
x	number | BigNumber | Complex | Unit | Array | Matrix	First value to check

Returns #

Type	Description
boolean | Array | Matrix	Returns true when input is a zero or empty value.

Examples #

math.not(2)      // returns false
math.not(0)      // returns true
math.not(true)   // returns false

a = [2, -7, 0]
math.not(a)      // returns [false, false, true]

See also #

and, or, xor