js 数组最大数

let arr = [1, 2, 3, 4, 5];
let maxNum = Math.max(...arr);
console.log(maxNum); // 输出：5

let arr = [1, 2, 3, 4, 5];
let maxNum = arr.reduce((a, b) => a > b ? a : b, arr[0]);
console.log(maxNum); // 输出：5

let arr = [1, 2, 3, 4, 5];
let maxNum = arr[0];

for (let i = 1; i < arr.length; i++) {
    if (arr[i] > maxNum) {
        maxNum = arr[i];
    }
}

console.log(maxNum); // 输出：5

let arr = [];
if (arr.length === 0) {
    console.log("数组为空");
} else {
    let maxNum = Math.max(...arr);
    console.log(maxNum);
}

let arr = [1, 'a', 3, null, 5];
let filteredArr = arr.filter(item => typeof item === 'number');
let maxNum = Math.max(...filteredArr);
console.log(maxNum); // 输出：5