Javascript sum total和total

// 使用循环求和
function sum(numbers) {
  let total = 0;
  for (let i = 0; i < numbers.length; i++) {
    total += numbers[i];
  }
  return total;
}

// 使用reduce函数求和
function sum(numbers) {
  return numbers.reduce((acc, curr) => acc + curr, 0);
}

// 示例用法
const numbers = [1, 2, 3, 4, 5];
const result = sum(numbers);
console.log(result); // 输出：15

// 计算购物车中商品的总价
function calculateTotalPrice(cart) {
  let total = 0;
  for (let i = 0; i < cart.length; i++) {
    total += cart[i].price * cart[i].quantity;
  }
  return total;
}

// 示例用法
const cart = [
  { name: '商品1', price: 10, quantity: 2 },
  { name: '商品2', price: 20, quantity: 1 },
  { name: '商品3', price: 5, quantity: 3 }
];
const totalPrice = calculateTotalPrice(cart);
console.log(totalPrice); // 输出：50