js中count什么意思

let count = 0;
for (let i = 0; i < 10; i++) {
    count++;
}
console.log(count); // 输出: 10

const numbers = [1, 2, 3, 4, 5];
let count = 0;
for (const num of numbers) {
    if (num % 2 === 0) {
        count++;
    }
}
console.log(count); // 输出: 2

const fruits = ['apple', 'banana', 'apple', 'orange', 'apple'];
const appleCount = fruits.filter(fruit => fruit === 'apple').length;
console.log(appleCount); // 输出: 3

let count = 0; // 确保初始化
for (let i = 0; i < 10; i++) {
    count++;
}
console.log(count); // 输出: 10