for (var i = 1; i <= 2; i = i+0.1){ alert(i); }
alert( ( 1 + 0.2 ).toFixed(1) );
for (var i = 1; i <= 2; i = i+0.1){ alert(i.toFixed(1)); }
for (var i = 10; i <= 20; i++){ x = i/10; }