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Adding two values at a time from an array - JavaScript
Let’s say, we are required to write a JavaScript function that takes in an array of Numbers and returns a new array with elements as sum of two consecutive elements from the original array.
For example, if the input array is −
const arr = [3, 6, 3, 87, 3, 23, 2, 2, 6, 8];
Then the output should be −
const output = [9, 90, 26, 4, 14];
Example
Following is the code −
const arr = [3, 6, 3, 87, 3, 23, 2, 2, 6, 8];
const twiceSum = arr => {
const res = [];
for(let i = 0; i < arr.length; i += 2){
res.push(arr[i] + (arr[i+1] || 0));
};
return res;
};
console.log(twiceSum(arr));Output
This will produce the following output in console −
[ 9, 90, 26, 4, 14 ]
Updated on: 18-Sep-2020
2K+ Views
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