Negate the List of Numbers

Given a list of numbers, negate all elements contained within.

• Negating a positive value -+n will return -n, because all +'s are removed.
• Negating a negative value --n will return n, because the first - turns the second minus into a +.

Examples

negate([1, 2, 3, 4]) ➞ [-1, -2, -3, -4]

negate([-1, 2, -3, 4]) ➞ [1, -2, 3, -4]

negate([]) ➞ []

Notes

If you get an empty list, return an empty list: []