Given an array of integers, find the pair of adjacent elements that has the largest product and return that product.

adjacentElementsProduct.js

function adjacentElementsProduct(inputArray) {
        let previousElement;
        let largestProduct = inputArray[0]*inputArray[1];
    inputArray.forEach(function(currentElement, index){
        if (index === 0) {
            previousElement = currentElement;
            return;
        }
        else if (previousElement*currentElement > largestProduct) {
            largestProduct = previousElement*currentElement
        }
        previousElement = currentElement;
    });
    return largestProduct;
}