Product Price decimal separators

Hello
Is there a way to modify the Displayed price of products that includes decimal separators so that the algebra price of the product to the nearest decimal number.
Thanks

Have you looked at Currency settings.  
Custom formatting
Rounding Type

Thanks
how i do if i want add extra condition ?

Please clarify "condition"?

Hello
I mean to add another rounded option. I want to round to the nearest quarter
Sample : 1.15 = 1.25 , 1.30 = 1.25
Regards

It would require customization