round in Smarty shows wrong result

Question

In my Smarty 3 template I have this code:

{$a=8.34}
{$b=8.33}
{$a-$b|round:2}

Expected result is: 0.01

But I receive this: 0.0099999999999998

Does anybody know how to fix this?

Answer 1

Smarty2 applied the modifier to the result of the complete expression.

Smarty3 does it just on the direct prepending value.

So in Smarty3 you have to use brackets:

{($a-$b)|round:2} 

That should solve it.