function bubble(a){a=a.slice();for(let i=0;i<a.length;i++)for(let j=0;j<a.length-1-i;j++)if(a[j]>a[j+1])[a[j],a[j+1]]=[a[j+1],a[j]];return a;}console.log(bubble([81,2,69,34,76,64,16,9]).join(","));