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Problem: Product of Array Except Self

Understand how to compute an array where each element is the product of all other elements except itself without using division. Learn to implement an efficient O(n) time and O(1) extra space algorithm by combining prefix and suffix products in JavaScript.

Statement

Given an integer array nums, return an array answer where answer[i] represents the product of all elements in nums except nums[i].

You must design an algorithm that operates in O(n)O(n) time complexity and does not use the division operation.

Note: The product of any prefix or suffix of nums is guaranteed to fit in a 3232-bit integer.

Constraints:

  • 22 \leq nums.length 105\leq 10^5 ...