Add two consecutive elements from the original array and display the result in a new array with JavaScript

We are required to write a JavaScript function that takes in an array of Numbers and returns a new array with elements as the sum of two consecutive elements from the original array.

For example, if the input array is −

const arrayOne = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];

Then the output should be −

const newArrayOne = [1, 5, 9, 13, 17]

Let's write the code for this function −

Example

const arrayOne = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
const doubleSum = arr => {
   const res = [];
   for(let i = 0; i < arr.length; i += 2){
      res.push(arr[i] + (arr[i+1] || 0));
   };
   return res;
};
console.log(doubleSum(arrayOne));

Output

The output in the console will be −

[ 1, 5, 9, 13, 17 ]

AmitDiwan

Published on 31-Aug-2020 13:48:47

• Related Questions & Answers
• Return the sum of two consecutive elements from the original array in JavaScript
• JavaScript - Constructs a new array whose elements are the difference between consecutive elements of the input array
• Divide numbers from two columns and display result in a new column with MySQL
• How to add new array elements at the beginning of an array in JavaScript?
• Counting the occurrences of JavaScript array elements and put in a new 2d array
• Consecutive elements sum array in JavaScript
• How to add two arrays into a new array in JavaScript?
• How to subtract elements of two arrays and store the result as a positive array in JavaScript?
• Return Top two elements from array JavaScript
• Compress array to group consecutive elements JavaScript
• Check for Subarray in the original array with 0 sum JavaScript
• Accumulating array elements to form new array in JavaScript
• Find original array from encrypted array (An array of sums of other elements) using C++.
• 8085 program to add two consecutive bytes of an array
• Query to divide the values of two columns and display the result in a new column using MySQL wildcard?