to me, "var a" is unorthodox. i'd rather use switch(expectedOutput){case 1:a=1;break;case 2:a=2;break;case 3:a=3;break;case 4:a=4;break;case 5:a=5;break;case 6:a=6;break;case 7:a=7;break;case 8:a=8;break;case 9:a=9;break;case 10:a=10;break;case 11:a=11;break;case 12:a=12;break;case 13:a=13;break;case 14:a=14;break;case 15:a=15;break;case 16:a=16;break;case 17:a=17;break;case 18:a=18;break;case 19:a=19;break;case 20:a=20}