数组

let ary = ['asdf', 'sadfa', 'asdfaf', 'afdsafds', 'afdsafdsadfs'];
for(let i = 0; i < ary.length; i++) {
    console.log(ary[i]);
}

对象

let students = [
    {name:'小明',age:18,gender:'男',hometown:'河北省'},
    {name:'小红',age:19,gender:'女',hometown:'河南省'},
    {name:'小刚',age:17,gender:'男',hometown:'山西省'},
    {name:'小丽',age:18,gender:'女',hometown:'山东省'}
]
for(let i = 0; i < students.length; i++) {
    // console.log(students[i])
    // console.log(students[i].name);
    // console.log(students[i].age);
    console.log(`学生姓名:${students[i].name} 学生年龄:${students[i].age}`)
}