var arr = [1,2,3,4,3,21,3,4,5,3,21,6];
//冒泡排序
function paixu(a){
for(var j=0;j<a.length;j++){
for(var i=0;i<a.length-j;i++) {
if(a[i]>a[i+1]){
var temp = a[i];
a[i] = a[i+1];
a[i+1] = temp;
}
}
}
console.log(a);
}
paixu(arr);
//sort()排序
function sss(a,b){
return a-b;
}
console.log(arr.sort(sss));