function random() { //题目 var arr = ["第一个","第二个","第三个","第四个","第五个","第六个","第七个","第八个","第九个","第十个"]; //要几个 var num = 5; var arr1 = []; for(let i=0;i<num;){ var who = Math.floor(Math.random()*arr.length) if(!arr1[who]){ arr1[who] = 1; console.log(arr[who]) document.write(arr[who]+"</br>") i++ } } } random()
//题目
var arr = ["第一个","第二个","第三个","第四个","第五个","第六个","第七个","第八个","第九个","第十个"];
//要几个
var num = 5; var arr1 = []; for(let i=0;i<num;){
var who = Math.floor(Math.random()*arr.length)
if(!arr1[who]){
arr1[who] = 1;
console.log(arr[who])
document.write(arr[who]+"</br>")
i++
}
}
}
random()