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Consecutive elements sum array in 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 arr1 = [1, 1, 2, 7, 4, 5, 6, 7, 8, 9];
Then the output should be −
const output = [2, 9, 9, 13, 17]
Example
The code for this will be −
const arr11 = [1, 1, 2, 7, 4, 5, 6, 7, 8, 9];
const consecutiveSum = arr => {
const res = [];
for(let i = 0; i < arr.length; i += 2){
res.push(arr[i] + (arr[i+1] || 0));
};
return res;
};
console.log(conseutiveSum(arr1));Output
The output in the console −
[ 2, 9, 9, 13, 17 ]
Updated on: 14-Oct-2020
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