//1.随机点名
//①把人名放入到数组中
var names = ['Tom','Jerry','David','Jeccy','Scot'];
//②随机从数组中取出一个值--随机下标
var num = Math.random()*names.length;
var num = Math.floor(num);
console.log(names[num]);
//①把人名放入到数组中
var names = ['Tom','Jerry','David','Jeccy','Scot'];
//②随机从数组中取出一个值--随机下标
var num = Math.random()*names.length;
var num = Math.floor(num);
console.log(names[num]);