Opposite number

[freedom5566]

https://www.codewars.com/kata/opposite-number/

題目

Very simple, given a number, find its opposite.

Examples:

1: -1
14: -14
-34: 34

But can you do it in 1 line of code and without any conditionals?

非常簡單，給你一個數字，找到這個數字的相反
但你能在一行程式中完成並不使用條件判斷？