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Find Pivot Index

Understand how to identify the pivot index in an integer array, where the sum of elements on both sides is equal. Learn to approach this problem by tracking sums effectively and implement your solution in JavaScript, preparing for common coding interviews.

Statement

Given an integer array nums, find the pivot index of the array.

The pivot index is defined as the index where the sum of all elements strictly to its left equals the sum of all elements strictly to its right. If the index lies on the left edge of the array, the left sum is considered 00 since no elements exist to its left. The same applies when the index lies on the right edge.

Return the leftmost pivot index. If no such index exists, return ...