function perimeter(l, num){ let dict = new Object(); dict = { 's' : 4*num, 'c' : 2*num*3.14, }; return dict[l] || undefined; }
function perimeter(l, num){ let dict = new Object(); dict = { 's' : 4*num, 'c' : 2*num*3.14, }; return dict[l] || undefined; }