Maximum Subarray Sum Solution in JavaScript | Maximum Subarray Leetcode Solution
This tutorial has maximum subarray leetcode solution in javascript. Write a function that finds the largest sum of any of its subarrays or find maximum subarray sum solution in JavaScript. The input is an array of numbers. The task is to find the contiguous subarray of array with the maximal sum of items. Here is how we take every element and calculate sums of all subarrays starting from it.
If the array only contains negative numbers, the function should return 0 as the largest sum of any of its subarrays. Define a function called "getMaxSubSum" which takes an array as its input. Use a variable "maxSum" initialized to 0, and a variable "currSum" initialized to 0. Iterate through the array using a for loop, adding each element to "currSum" and comparing it to "maxSum" at each iteration.
If "currSum" is greater than "maxSum", "maxSum" is updated to the value of "currSum". If "currSum" is less than 0, "currSum" is reset to 0. After the for loop finishes, return the final value of "maxSum". Call the function with the array as its input, and the function will return the maximum sum of a subarray in the input array.
There is another slightly different approach of doing it using nested for loops.
Define a function called "getMaxSubSum" which takes an array as its input. Use a variable "maxSum" initialized to 0. Start the outer for loop at the first index of the input array and iterate through each element. Start the inner for loop at the current index of the outer loop and go through each element of the array. Create a subarray that starts at the current index of the outer loop and continues to the end of the input array.
For each subarray, the inner loop sums up the elements and assigns it to the variable "sumFixedStart". Then compare "sumFixedStart" with "maxSum" and assign the maximum value to "maxSum". After both loops finish, return the final value of "maxSum".
Call the function with the array as its input, and the function will return the maximum sum of a subarray in the input array.
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