Flip Signs

L1 Easy Arrays & Hashing
Concept
Building a new array from an existing one is a two-step habit: create an empty result, then append one transformed value per source element.
Return a new array where every integer in nums is negated: positive values become negative and negative values become positive. 0 stays 0.
Examples
▸ nums = [1, -2, 3]
→ [-1, 2, -3]
▸ nums = [0, 5, -5]
→ [0, -5, 5]
▸ nums = []
→ []
Progressive Hints
Hint 1 · Nudge
Every value just trades its sign. Zero is its own opposite, so it stays put.
Hint 2 · Plan
Create an empty result array. For each element, append its negation. Return the result array.
Hint 3 · Approach
result = []. For each n: append -n to result. Return result.
Output
// Run your code to see the output here.