js 怎么累加数字

let numbers = [1, 2, 3, 4, 5];
let sum = 0;

for (let i = 0; i < numbers.length; i++) {
  sum += numbers[i];
}

console.log(sum); // 输出: 15

let numbers = [1, 2, 3, 4, 5];
let sum = 0;

numbers.forEach(function(number) {
  sum += number;
});

console.log(sum); // 输出: 15

let numbers = [1, 2, 3, 4, 5];

let sum = numbers.reduce(function(accumulator, currentValue) {
  return accumulator + currentValue;
}, 0);

console.log(sum); // 输出: 15

let numbers = [1, 2, 3, 4, 5];
let sum = 0;

for (let number of numbers) {
  sum += number;
}

console.log(sum); // 输出: 15

let numbers = [1, '2', 3, 'four', 5];
let sum = numbers.reduce(function(accumulator, currentValue) {
  let value = Number(currentValue);
  return isNaN(value) ? accumulator : accumulator + value;
}, 0);

console.log(sum); // 输出: 9