product-of-array-except-self.js

/**
 * @param {number[]} nums
 * @return {number[]}
 */

var productExceptSelf = function(nums) {
    
    // Value to increment per each index
    
    let carry = 1
    
    // Array to return all the product values
    
    const output = Array(nums.length).fill(1)
    
    // Add products to output array starting at the front
    
    for(let i = 0; i < nums.length;i++){
        output[i]*=carry
        carry*=nums[i]
    }
    
    // Reset carry
    
    carry = 1
    
    // Add products to output array starting at the back
    
    for(let i = nums.length-1; i >= 0; i--){
        output[i]*=carry
        carry*=nums[i]
    }
    
    return output;
    
};