var ar1 = [1, 5, 6, 4, 3, 5, 100, -20]; function funDo(ar){ for(k=0,i=1,temp = ar.length-1;k<temp;k++)i=(i<< 1)+1; for(;i>0;i--){ for(k=0,sum=0,temp2=[];k<ar.length;k++) if((i>>(k))%2) { sum+=ar[k]; temp2.push(ar[k]);} if(sum==10) console.log(temp2);} } funDo(ar1);