Adding Consecutive Elements of Array

Question

Trying to add two elements of an array together, ie

• [2,4,6,8,10,12] should return a new array of [6, 14, 22] (2+4, 6+8, 10+12)
• [4,2,7,15,35,23] should return a new array of [6,22,58] - (4+2, 7+15, 35+23)

New, frustrated and cannot formulate a for loop properly to achieve the desired result.

My wrong solution I tried so far:

 var newArray = [];

  for (let i = 0; i<numbers.length - 1; i +=2) {
    newArray = numbers.push(numbers[i] + numbers[i] + 1);
    console.log(newArray);
  }

Answer 1

Quick and easy, assuming input will always be an array of an even length

const data = [4,2,7,15,35,23]
const length = data.length
const res = []
for(let i = 0; i < length; i+=2){
  var num1 = data[i]
  var num2 = data[i + 1]
  res.push(num1 + num2)
}
console.log(res)

Answer 2

You were close:

let newArray = [];

const numbers = [2,4,6,8,10,12];

for (let i = 0; i < numbers.length - 1; i += 2) {
  newArray.push(numbers[i] + numbers[i + 1]);
}

console.log(newArray);