Sign of the product of an array

Array Math

64.8% acceptance

Feb 25, 2026

2290

231

Implement a function signFunc(x) that returns: 1 if x is positive. -1 if x is negative. 0 if x is equal to 0. You are given an integer array nums. Let product be the product of all values in the array nums. Return signFunc(product).

Solution

Rust

Time O(n)

Space O(1)

LeetCode

solution.rs

impl Solution {
  pub fn array_sign(nums: Vec<i32>) -> i32 {
    let mut neg = 0i32;
    for &n in &nums {
      if n == 0 { return 0; }
      if n < 0 { neg += 1; }
    }
    if neg % 2 == 1 { -1 } else { 1 }
  }
}