Negative

Negative[ expr ] applies the minus sign to an expression.

Usages

`Negative[ expr ]`

Negative[ expr ] represents -expr. Writing -x in a script gives the same result as Negative[x]. For a positive number, the minus sign is applied directly; otherwise the expression is kept as Negative[ expr ] and displayed with a minus sign.

Example	in	out
A positive integer.	`Negative[ 3 ]`	`-3`
A positive decimal number.	`Negative[ 2.5 ]`	`-2.5`
An expression is kept as it is.	`Negative[ Pi ]`	`Negative[Pi]`
`-x` is the same as `Negative[x]`.	`-x`	`Negative[x]`
A list: each element is negated.	`Negative[ {1, 2} ]`	`{-1, -2}`

Example	in	rendered
The constant `-π`.	`Negative[ Pi ]`	$\text{-}\pi$
A product with `-π`.	`3 Negative[ Pi ]`	$3\times \text{-}\pi$
A sum with a negative number is displayed as a subtraction.	`x + Negative[3]`	$x - 3$

Details

Double minus: Negative[ -3 ] is not simplified to 3; it stays Negative[-3].
Numerical calculates the value: Numerical[ Negative[Pi] ] gives -3.14159265359.

See also: CalcAbs, CalcTimes, Numerical