03. Sum Numbers

function SumNumbers(input) {
    let firstNum = Number(input[0]);
    let index = 1;
    let sum = 0;

    while (firstNum > sum) {
        sum += Number(input[index]);
        index++;
    }
    console.log(`${sum}`);
}

ИЛИ ТАКА:

function SumNumbers(input) {
    let firstNum = Number(input[0]);
    let index = 0;
    let sum = 0;

    while (firstNum > sum) {
        sum += Number(input[++index]);
    }
    console.log(`${sum}`);
}

РЕШЕНИЕ СЪС SHIFT:

function SumNumbers(input) {
    let firstNum = Number(input.shift());
    let sum = 0;

    while (firstNum > sum) {
        sum += Number(input.shift());
    }
    console.log(`${sum}`);
}

РEШЕНИЕ С FOR:

function sumNumbers(input) {
    let firstNum = Number(input[0]);
    let sum = 0;

    for (let i = 1; i <= Number.MAX_VALUE; i++) {
        sum += Number(input[i]);
        if (firstNum <= sum) {
            console.log(`${sum}`);
            return;
        }
    }
}