Суммa элeментoв пoд чeтными индeксaми?

let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

let sum = 0;

for (let i = 0; i < arr.length; i++) {
    if (i % 2 === 0) {
        sum += arr[i];
    }
}

console.log('The sum of numbers with even index is equal to: ' + sum);

node index.js                                                                                                                                                                                                         
# The sum of numbers with even index is equal to: 25