Recursion to Sum Nested Array in JavaScript

We are required to write a JavaScript function that takes in a nested array of Numbers and returns the sum of all the numbers present in the array.

Let’s say the following is our nested array −

const arr = [2, 5, 7, [    4, 5, 4, 7, [        5, 7, 5    ], 5 ], 2];

Example

Following is the code −

const arr = [2, 5, 7, [    4, 5, 4, 7, [       5, 7, 5    ], 5 ], 2]; const calculateSum = (arr, query) => {    let count = 0;    for(let i = 0; i < arr.length; i++){       if(Array.isArray(arr[i])){          count += calculateSum(arr[i], query);          continue;       };       count += arr[i];    };    return count; }; console.log(calculateSum(arr));

Output

This will produce the following output in console −

58